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Hand Valves(Connecting Tube Diameter:Ø4)

Hand valves are devices used to manually adjust the flow direction, pressure, flow rate or another property of a fluid (liquid, vapor or gas). Hand valve bodies are made of materials such as aluminum, steel, stainless steel, PVC and resin. Hand valves are usually connected for use with pipes containing flowing fluids using fittings made of the same material as the hand valve body. Hand valve controls are often made of a different material from the body. The controls come in forms such as knobs, handles and levers. The standard types are 2-way valves with 2 fluid input/output ports and 3-way valves with 3. They are attached in accordance with the direction of fluid flow. There are many different hand valve models designed to connect to different pipe diameters and support different operating pressure ranges. There are also different fitting types such as screw-in, flange and welded fittings, so each hand valve model should be selected to match the operating environment.
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  • You can add up to 6 items per a category to the compare list. Sale

    Finger Valve VHK Series
    Finger Valve VHK Series
    Finger Valve VHK Series
    Finger Valve VHK Series
    Finger Valve VHK Series
    Finger Valve VHK Series
    Finger Valve VHK Series
    Sale

    Finger Valve VHK Series

    SMC

    Finger Valve VHK Series that makes it easy to distinguish between 2-port valves and 3-port valves by the color of the knobs. [Features]· Poppet valve construction that rarely suffers from seal defects.· The direction of the knob clearly indicates whether the valve is open or closed.

    CAD :
    2D / 3D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port / 3-Port Knob 1.48 ~ 2.58 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed - Direct Side Surface 5 or Less Side / Bottom
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    Finger Valve, VHK-A Series

    Finger Valve, VHK-A Series

    SMC

    [Features]・ The opening and closing of the valve is easily displayed by the direction of the knob・ Small knob operation force (0.04 to 0.14 N・m)・ With handle removal prevention function・ Large effective cross-section precision 2.0 to 17.5 mm2・ Poppet valve structure with few seal defects・ Series from tube outer diameter ø4・ 4 types can be selected according to the piping specifications・ The 3-port valve exhausts the residual pressure on the 2 (A) side with SHUT (There is no exhaust port)

    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port / 3-Port Manual Lever 2.58 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed / 2-Position Exhaust - Direct Side Surface 5 or Less Side / Bottom
    Days to Ship: Số ngày giao hàng: 32 Day(s) or more
    day to ship 32 Day(s) or more
  • You can add up to 6 items per a category to the compare list. Sale

    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Shut-off Valve Hand Valve Union Straight
    Sale

    Shut-off Valve Hand Valve Union Straight

    PISCO

    [Features]· Capable of opening and closing air pressure inlet to equipment.· 3-Way type releases residual pressure from outlet side when it is closed.· Can be selected from 4 types depending on the purpose of use.

    CAD :
    2D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 3.4 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed - - 5 or Less Side
    From: 247,248 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.

    Hand Valve HVU

    Hand Valve HVU【25 Pieces Per Package】

    CDC

    [Features] · The compressed air for pneumatic equipment can be easily turned on/off by rotating a handle. · Allows maintenance and inspection with no residual pressure inside machinery. · When the 3-way valve is off, the residual pressure inside the machinery is released into the atmosphere while blocking the inflow of air. [Applications] · Used to open/close the pneumatic pressure to the equipment.

    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 Others Others - One-Touch Fitting Type One-Touch Plumbing - - - - -
    From: 3,138,610 VND
    Days to Ship: Số ngày giao hàng: 6 Day(s)
    day to ship 6 Day(s)
  • You can add up to 6 items per a category to the compare list.

    Ball Valves - One-Touch Couplings - Straight - Single Handle

    Ball Valves - One-Touch Couplings - Straight - Single Handle

    MISUMI

    - Ball Valves - One-Touch Couplings - Straight- Part number is BVCS.- Resin Body Material: PBT (Polybutylene Terephthalate)- O-Rings material: NBR (Nitrile Rubber)- Switching Operation: Single Handle.- Applicable to Tube Outer Dia. D (or D1): 4 and 6 mm.- Operating Temperature Range: 0 to 60℃- Operating Pressure Range: 0 to 0.7 MPa- Number of ports: 2 Port.- Applicable Fluid: Air.- Single handle type has a scale on lever and can control the flow.

    • Volume Discount
    CAD :
    2D / 3D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 3.8 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed - - - -
    From: 247,516 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    Hand Valve, BVHVU
    Hand Valve, BVHVU
    Hand Valve, BVHVU

    Hand Valve, BVHVU

    MISUMI

    - Hand Valves With One-Touch Coupling/ 2-Way Valve, 3-Way Valve- Part number is BVHVU.- Resin Body Material: PBT (Polybutylene Terephthalate)- Metal Section: Brass (Electroless nickel plating Surface Treatment)- Seal Rubber: NBR (Nitrile Rubber).- Applicable to Tube Outer Dia. D: 4, 6, 8, 10 and 12 mm.- Operating Temperature Range: 0 to 60℃- Max. Operation Pressure: 1.0 MPa- Handle Color: Blue and Red color.- Applicable Fluid: Air.- Hand Valves standard: RoHS10 compliant.- C-Value Hand Valves with One-Touch Coupling- 2-Way Valve/ 3-Way Valve- Part number is C-BVHVU.- Applicable to Tube Outer Dia. D: 6, 8, 10 and 12 mm.- Operating Temperature Range: 0 to 60℃- Color Lever: (3-Way Valve) Red Lever and (2-Way Valve) Blue Lever.- Applicable Fluid: Air.- Hand Valves C-Value production not RoHS compliant.- To open a valve: Turn the cap lever 90 degrees counterclockwise until it stops to let air flow.

    • Volume Discount
    CAD :
    2D / 3D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 - Knob 3.4 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed / 2-Position Exhaust - - - -
    From: 257,525 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    Ball Valves - One-Touch Couplings - Elbows - Single Handle

    Ball Valves - One-Touch Couplings - Elbows - Single Handle

    MISUMI

    - Ball Valves - One-Touch Couplings - Elbow- Part number is BVCE.- Resin Body Material: PBT (Polybutylene Terephthalate)- O-Rings material: NBR (Nitrile Rubber)- Switching Operation: Single Handle.- Applicable to Tube Outer Dia. D: 4 and 6 mm.- Operating Temperature Range: 0 to 60℃- Operating Pressure Range: 0 to 0.7 MPa- Number of ports: 2 Port.- Applicable Fluid: Air.- Single handle type has a scale on lever and can control the flow.

    • Volume Discount
    CAD :
    2D / 3D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 4 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed - - - -
    From: 301,107 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    Straight Shut-off Ball Valve 10 Series

    Straight Shut-off Ball Valve 10 Series

    PISCO

    Effective sectional area is secured according to the size of the tube used.

    CAD :
    2D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 3.8 One-Touch Fitting Type Others 2-Position Normally Open 1/8 - 5 or Less -
    From: 224,993 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    Shut-off Valve, Ball Valve 10 Series, Different Diameter Union Elbow

    Shut-off Valve, Ball Valve 10 Series, Different Diameter Union Elbow

    PISCO

    - Ball Valve Mini (10) series, Unequal Dia. Union BVLG.- Material-Body: resin PBT (Polybutylene terephthalate).- Metal Section: Brass with electroless nickel plating.- Seal Rubber: NBR (Nitrile Rubber).- Operation temperature range: 0 to 60℃ (no freezing)- Applicable Tube O.D. (D1): 4 and 6 mm- Number of ports: 2- Applicable: Air and Water.- Ball Valve turns on and off-air pressure to pneumatic devices.- The flow rate can be adjusted roughly by setting the angle of the lever.

    CAD :
    2D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 4 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Open - - 5 or Less -
    From: 261,890 VND
    Days to Ship: Số ngày giao hàng: 9 Day(s) or more
    day to ship 9 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    Finger Valve, Rechargeable Battery Compatible, 25A-VHK Series

    Finger Valve, Rechargeable Battery Compatible, 25A-VHK Series

    SMC

    [Rechargeable battery compatible series]Copper (Cu) and zinc (Zn) materials are not used in the rechargeable battery manufacturing process to reduce product defects.Some aluminum alloys and die-cast aluminum materials contain small amounts of copper (Cu) and zinc (Zn) as additive elements.Electrolytic nickel plating and zinc plating with copper base are not used. (Electroless nickel plating is used.)It uses low dew point compatible grease, -70°C compatible, improved performance in low dew point environment.

    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 3-Port Knob 2.58 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed - Direct Side Surface 5 or Less Side
    From: 237,600 VND
    Days to Ship: Số ngày giao hàng: 32 Day(s)
    day to ship 32 Day(s)
  • You can add up to 6 items per a category to the compare list.

    Ball Valves - One-Touch Couplings - Union Straight - Single Handle

    Ball Valves - One-Touch Couplings - Union Straight - Single Handle

    MISUMI

    - Ball Valves - One-Touch Couplings - Union Straight- Part number is BVUS.- Resin Body Material: PBT (Polybutylene Terephthalate)- O-Rings material: NBR (Nitrile Rubber)- Switching Operation: Single Handle.- Applicable to Tube Outer Dia. D: 4 and 6 mm.- Operating Temperature Range: 0 to 60℃- Operating Pressure Range: 0 to 0.7 MPa- Number of ports: 2 Port.- Applicable Fluid: Air.- Single handle type has a scale on lever and can control the flow.

    • Volume Discount
    CAD :
    2D / 3D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 3.4 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Closed - - - -
    From: 260,862 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    10 Series Elbow Shut-off Valve and Ball Valve

    10 Series Elbow Shut-off Valve and Ball Valve

    PISCO

    Effective sectional area is secured according to the size of the tube used.

    CAD :
    2D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 4 One-Touch Fitting Type Others 2-Position Normally Open 1/8 - 5 or Less -
    From: 264,630 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    Shut-off Valve Ball Valve 10 Series Union Elbow

    Shut-off Valve Ball Valve 10 Series Union Elbow

    PISCO

    - Ball Valve Mini (10) series, Union Elbow BVLU.- Material-Body: resin PPS (Polyphenylene sulfide)- Metal Section: Brass with electroless nickel plating.- Seal Rubber: NBR (Nitrile Rubber).- Operation temperature range: 0 to 60℃ (no freezing)- Applicable Tube O.D. Size: 4 and 6 mm- Applicable: Air and Water.- How to open / close the valve: To open the valve, turn the lever 90 degrees in the counterclockwise direction. To close, turn the lever in the clockwise direction until it stops.

    CAD :
    2D
    Connecting Tube Diameter Number of Ports Switching Operation Effective Sectional Area(mm2) Main Body Shape Pipe Port Type Number of Switching Positions Plumbing Thread Nominal Plumbing Type and Direction Effective Sectional Area【classification】(mm2) How to Mount
    Ø4 2-Port Knob 4 One-Touch Fitting Type One-Touch Plumbing 2-Position Normally Open - - 5 or Less -
    From: 261,778 VND
    Days to Ship: Số ngày giao hàng: 9 Day(s) or more
    day to ship 9 Day(s) or more
BrandNhãn hiệu
Product SeriesDòng sản phẩm
CADCAD
From
Days to ShipSố ngày giao hàng
Connecting Tube Diameter
Number of Ports
Switching Operation
Effective Sectional Area(mm2)
Main Body Shape
Pipe Port Type
Number of Switching Positions
Plumbing Thread Nominal
Plumbing Type and Direction
Effective Sectional Area【classification】(mm2)
How to Mount

    You can add up to 6 items per a category to the compare list.Sale

    Finger Valve VHK Series
      Finger Valve VHK Series
      Finger Valve VHK Series
      Finger Valve VHK Series
      Finger Valve VHK Series
      Finger Valve VHK Series
      Finger Valve VHK Series

        You can add up to 6 items per a category to the compare list.

        Finger Valve, VHK-A Series

            You can add up to 6 items per a category to the compare list.Sale

            Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight
              Shut-off Valve Hand Valve Union Straight

                You can add up to 6 items per a category to the compare list.

                Hand Valve HVU

                    You can add up to 6 items per a category to the compare list.

                    Ball Valves - One-Touch Couplings - Straight - Single Handle

                        You can add up to 6 items per a category to the compare list.

                        Hand Valve, BVHVU
                          Hand Valve, BVHVU
                          Hand Valve, BVHVU

                            You can add up to 6 items per a category to the compare list.

                            Ball Valves - One-Touch Couplings - Elbows - Single Handle

                                You can add up to 6 items per a category to the compare list.

                                Straight Shut-off Ball Valve 10 Series

                                    You can add up to 6 items per a category to the compare list.

                                    Shut-off Valve, Ball Valve 10 Series, Different Diameter Union Elbow

                                        You can add up to 6 items per a category to the compare list.

                                        Finger Valve, Rechargeable Battery Compatible, 25A-VHK Series

                                            You can add up to 6 items per a category to the compare list.

                                            Ball Valves - One-Touch Couplings - Union Straight - Single Handle

                                                You can add up to 6 items per a category to the compare list.

                                                10 Series Elbow Shut-off Valve and Ball Valve

                                                    You can add up to 6 items per a category to the compare list.

                                                    Shut-off Valve Ball Valve 10 Series Union Elbow
                                                      BrandNhãn hiệu

                                                      SMC

                                                      SMC

                                                      PISCO

                                                      CDC

                                                      MISUMI

                                                      MISUMI

                                                      MISUMI

                                                      PISCO

                                                      PISCO

                                                      SMC

                                                      MISUMI

                                                      PISCO

                                                      PISCO

                                                      Product SeriesDòng sản phẩm

                                                      Finger Valve VHK Series

                                                      Finger Valve, VHK-A Series

                                                      Shut-off Valve Hand Valve Union Straight

                                                      Hand Valve HVU【25 Pieces Per Package】

                                                      Ball Valves - One-Touch Couplings - Straight - Single Handle

                                                      Hand Valve, BVHVU

                                                      Ball Valves - One-Touch Couplings - Elbows - Single Handle

                                                      Straight Shut-off Ball Valve 10 Series

                                                      Shut-off Valve, Ball Valve 10 Series, Different Diameter Union Elbow

                                                      Finger Valve, Rechargeable Battery Compatible, 25A-VHK Series

                                                      Ball Valves - One-Touch Couplings - Union Straight - Single Handle

                                                      10 Series Elbow Shut-off Valve and Ball Valve

                                                      Shut-off Valve Ball Valve 10 Series Union Elbow

                                                      CADCAD
                                                      • 2D / 3D
                                                      • 2D
                                                      • 2D / 3D
                                                      • 2D / 3D
                                                      • 2D / 3D
                                                      • 2D
                                                      • 2D
                                                      • 2D / 3D
                                                      • 2D
                                                      • 2D
                                                      From

                                                      247,248 VND

                                                      Special Price

                                                      On Sale Till 31/03/2025

                                                      3,138,610 VND

                                                      247,516 VND

                                                      257,525 VND

                                                      301,107 VND

                                                      224,993 VND

                                                      261,890 VND

                                                      237,600 VND

                                                      260,862 VND

                                                      264,630 VND

                                                      261,778 VND

                                                      Days to ShipSố ngày giao hàng Same day or more 32 Day(s) or more Same day 6 Day(s) 4 Day(s) or more Same day or more 4 Day(s) or more 4 Day(s) or more 9 Day(s) or more 32 Day(s) 4 Day(s) or more Same day or more 9 Day(s) or more
                                                      Connecting Tube DiameterØ4Ø4Ø4Ø4Ø4Ø4Ø4Ø4Ø4Ø4Ø4Ø4Ø4
                                                      Number of Ports2-Port / 3-Port2-Port / 3-Port2-PortOthers2-Port-2-Port2-Port2-Port3-Port2-Port2-Port2-Port
                                                      Switching OperationKnobManual LeverKnobOthersKnobKnobKnobKnobKnobKnobKnobKnobKnob
                                                      Effective Sectional Area(mm2)1.48 ~ 2.582.583.4-3.83.443.842.583.444
                                                      Main Body ShapeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting TypeOne-Touch Fitting Type
                                                      Pipe Port TypeOne-Touch PlumbingOne-Touch PlumbingOne-Touch PlumbingOne-Touch PlumbingOne-Touch PlumbingOne-Touch PlumbingOne-Touch PlumbingOthersOne-Touch PlumbingOne-Touch PlumbingOne-Touch PlumbingOthersOne-Touch Plumbing
                                                      Number of Switching Positions2-Position Normally Closed2-Position Normally Closed / 2-Position Exhaust2-Position Normally Closed-2-Position Normally Closed2-Position Normally Closed / 2-Position Exhaust2-Position Normally Closed2-Position Normally Open2-Position Normally Open2-Position Normally Closed2-Position Normally Closed2-Position Normally Open2-Position Normally Open
                                                      Plumbing Thread Nominal-------1/8---1/8-
                                                      Plumbing Type and DirectionDirect Side SurfaceDirect Side Surface-------Direct Side Surface---
                                                      Effective Sectional Area【classification】(mm2)5 or Less5 or Less5 or Less----5 or Less5 or Less5 or Less-5 or Less5 or Less
                                                      How to MountSide / BottomSide / BottomSide------Side---

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                                                      1. 1

                                                      Application example related to this categoryVí dụ ứng dụng liên quan đến danh mục này

                                                      Related Categories to Hand ValvesDanh mục liên quan đến Hand Valves

                                                      FAQ Hand Valves

                                                      Question: What is a hand valve and its functions?
                                                      Answer: A hand valve is a manually operated device used to control the flow of fluid (liquids or gases) in a system. It consists of a handle or lever that, when turned, adjusts the position of an internal mechanism to either open or close the valve. Hand valves serve to regulate fluid flow, isolate sections of a pipeline for maintenance, and control pressure. They find application in various industries such as plumbing and industrial processes.
                                                      Question: When should you use the hand valve?
                                                      Answer: Use a hand valve when manual control of fluid flow is necessary. It's employed to start, stop, or adjust flow rates in systems requiring human intervention, such as emergencies, maintenance, or precise adjustments. Hand valves are useful when automation isn't feasible, during equipment servicing, or when immediate response to changes is needed. They offer a simple and reliable means of flow regulation in various industries.
                                                      Question: What are the advantages and disadvatages of hand valves / manual valves?
                                                      Answer: Advantages of hand valves (manual valves) include simplicity, reliability, and cost-effectiveness. They offer precise control and immediate response during emergencies or maintenance, making them suitable for small-scale applications. However, they can be slower to operate compared to automated valves, require physical presence for adjustments, and might not be suitable for large-scale or continuous processes. Additionally, potential human error in operation and limited remote control are notable disadvantages.
                                                      Question: What are the common materials used for valves?
                                                      Answer: Hand valves are commonly constructed from materials such as brass, stainless steel, cast iron, bronze, and plastic (such as PVC or CPVC). The choice of material depends on factors like the type of fluid being handled, pressure requirements, temperature conditions, and corrosion resistance. These materials ensure durability and compatibility with various applications across industries like plumbing, industrial processes, and water treatment.