●What Are Water Valves?
Water valves are devices used to control the flow of water in various pipes and piping systems. They are an essential component in residential,commercial and industrial environments, allowing users to regulate water supply, regulate pressure and prevent backflow.
- – Water valves play a vital role in managing water flow and pressure in your plumbing system.
- – They provide control over water use, prevent damage to fixtures and appliances, and ensure the safety and efficiency of the water system.
●What Products Are Included In Water Valves?
1.Flanged Resilient NRS Gate Valve:
Gate valves with resilient seats (NRS) and flange end connections.
Resilient valve seat provides a tight seal and reduces the risk of leakage.
Flanges are bolted connections that provide a secure and leak-proof connection between the valve and piping system.
2.DIN F4 Flange Resilient NRS Gate Valve:
Gate valve with resilient seat (NRS) and flange end connection according to German Institute for Standardization (DIN) F4 standard.
DIN F4 specifies dimensions, tolerances and pressure classes for flange connections.
3.Flange anti-theft gate valve:
Gate valve with flanged end connections and built-in anti-theft mechanism.
Anti-theft mechanism helps prevent unauthorized disassembly or tampering of the valve.
4.French Type Magnetic Encryption Gate Valve:
Gate valves feature a unique magnetic encryption mechanism for secure and tamper-proof operation.
Magnetic encryption technology ensures that only authorized personnel can operate the valve.
5.Mechanical Joint Resilient NRS Gate Valve:
Gate valves with resilient seats (NRS) and mechanical joint end connections.
Mechanical joint connections use compression gaskets to create a leak-proof seal between the valve and piping system.
6.Threaded Joint Resilient NRS Gate Valve:
Gate valves with resilient seats (NRS) and threaded end connections.
Threaded connections use external and internal threads to create a strong and leak-proof joint between the valve and piping system.
7.Electric Gate Valve:
Gate valves operated with electric actuators.
Electric actuators enable remote control and automation of valves, making them suitable for industrial and commercial applications.
8.Buried Gate Valve for Underground application:
Gate valves designed for underground applications such as water distribution systems.
These valves are usually made of corrosion-resistant materials and have special features to withstand the challenges of underground environments.
9.Double eccentric flange butterfly valve:
Butterfly valve with double eccentric design, which means the axis is offset from the center of the valve body.
This design provides better sealing and reduces wear on valve components.
10.Universal wafer butterfly valve with sprocket gearbox:
Wafer butterfly valve with sprocket gearbox for manual operation.
The wafer valve is mounted between two flanges and a sprocket gearbox allows the valve to be opened and closed easily.
11.Ball check valve:
A check valve that uses a spherical disc to control the flow of water.
When the water flows in the right direction, the ball will be pushed away and the water will pass through. When the flow reverses, the ball closes to prevent backflow.
12.rubber disc swing check Valve:
Swinging check valve with a rubber disc that swings on a hinge to control water flow.
Rubber disc improves sealing and allows effective flow control.
13.Single door wafer check valve:
Non-return valve. It consists of a single door that swings on hinges to control the flow of water.
Designed to be sandwiched between two flanges, providing a compact, space-saving solution.
14.Silent check valve:
A check valve specifically designed to minimize or eliminate the noise produced when the valve closes.
Combines features such as damping mechanisms and slow closing speeds to reduce water hammer effects.
15.Flanged bottom valve:
Valve with bottom outlet and flange end connection.
Typically used in applications where water needs to be drained from the bottom of a tank or container.
16.axial flow check Valve:
A check valve allows water to flow in a straight line through the valve.
Designed to minimize pressure drop and turbulence, suitable for high flow applications.
17.Fully lined rubber double door wafer check valve:
Wafer check valve with two doors that swing by hinges to control water flow.
The valve is fully lined with rubber for excellent corrosion resistance and sealing.
18.slow closure Butterfly check Valve:
A check valve that uses a butterfly plate to control the flow of water.
Slow closing design reduces water hammer effect and minimizes pressure fluctuations.
19.Threaded integrated check Valve:
Check valve with threaded end connection for easy installation into threaded piping systems.
Provides a convenient solution for applications that require threaded connections.
20.Flanged Y-Type strainer:
Filter with Y-shaped body and flange end connection.Used to remove debris and particles from water streams to prevent damage to downstream equipment.
21.Grooved diversion strainer:
A filter used in water valves that can divert and filter debris or solid particles in flowing water to prevent clogging or damage to downstream components.
22.cross stretch strainer:
A strainer designed with a cross-shaped mesh or perforated plate, used to filter impurities in the water valve. It helps maintain flow rates by preventing clogging caused by debris.
23.Flanged metal seated globe Valve:
A valve with a metal seat that forms a tight seal when closed. It is often used in water systems to regulate or stop the flow of water.
24.flexible rubber Joint single sphere:
A flexible joint with a single sphere rubber element used to absorb vibration, compensate for misalignment, and reduce stress on water pipelines.
25.flexible rubber Joint twin sphere:
Similar to the single sphere joint, but with two spherical rubber elements, which improves the flexibility and motion absorption capacity of the water pipeline.
26.Ductile iron double flange limited expansion joint:
A double flange joint made of ductile iron, used to adapt to thermal expansion and contraction in water pipes while maintaining a tight seal.
27.compound high speed air bleeding valve:
A valve used to quickly remove bubbles or trapped air in water pipes. It helps improve the efficiency and performance of water systems.
28.Diaphragm type quick-opening mud drain valve:
a valve with a diaphragm mechanism that can be opened and closed quickly. It is mainly used to drain or flush mud or sediment in water pipes.
29.high speed air bleeding valve:
Similar to the compound high-speed exhaust valve, it is designed to effectively remove the trapped air in the water pipe.
30.Anti-fouling isolation valve:
a valve used to isolate or cut off the flow of water in the system to prevent scaling or pollution. It helps maintain the cleanliness and integrity of your water supply.
31.electromagnetic control valve:
This type of water valve uses an electromagnetic mechanism to control the flow of water. It is commonly used in industrial applications where precise control of water flow is required.
32.Pressure Reducing Valve:
A pressure reducing valve is designed to reduce the pressure of water flowing through a pipe. It is commonly used in residential and commercial buildings to maintain consistent and safe water pressure.
33.Pressure relief & sustaining valve:
This valve is used to release excess pressure in the water system and maintain a constant pressure within a specific range. It ensures that the pressure does not exceed a certain limit and protects the system from damage.
34.surge anticipating valve:
Surge anticipation valve is used to prevent water hammer or pressure fluctuations in pipelines. They help absorb sudden changes in pressure and protect the system from damage.
35.Pump control valve:
This valve is used to control the operation of pumps in water systems. It regulates water flow and ensures the pump is operating within its specified parameters.
36.Remote float control valve:
This valve is equipped with a float mechanism, which can control the opening and closing of the valve according to the water level. It is commonly used in storage tanks and reservoirs to maintain required water levels.
37.slow shut control valve:
This valve is designed to gradually close or open to prevent sudden changes in water flow and reduce the risk of water hammer. It is often used in applications where gradual changes in flow are required.
38.Pressure differential by-pass balancing valve:
This valve is used to balance the pressure difference on both sides of the water system. It ensures even pressure distribution and prevents over- or under-pressure in specific areas.
39.Single chamber float valve:
This valve uses a float mechanism to control the opening and closing of the valve according to the water level. Commonly used in toilets and water tanks.
40.Single chamber solenoid valve:
This valve is controlled by an electromagnet and is used to control the flow of water. It is commonly used in irrigation systems, drinking fountains, and other applications where remote control of water flow is required.
41.Flanged Resilient OS&Y Gate valve:
This valve has a flange connection, a flexible (rubber) seat, and an external screw and yoke mechanism. It is used to control the flow of water in large pipes.
42.Flanged Resilient NRS Gate Valve:
similar to OS&Y gate valve, but it has a concealed stem (NRS). When the valve opens or closes, the valve stem does not move up or down.
43.Grooved Resilient OS&Y Gate Valve:
This gate valve uses grooved connections instead of flanged connections. It is commonly used in fire protection systems.
44.Grooved Resilient NRS Gate Valve:
similar to grooved OS&Y gate valve, but it has a concealed stem.
45.Wafer Butterfly Valve:
This valve has a wafer-type valve body and a rotating disc that controls the flow of water. It is compact, lightweight and suitable for low voltage applications.
46.Lugged Wafer Butterfly valve:
Similar to the wafer butterfly valve, but there are lugs on the valve body to facilitate installation and removal.
47.Grooved Butterfly Valve:
This butterfly valve has grooved ends for quick and easy installation. It is commonly used in fire protection systems and other industrial applications.
48.Grooved butterfly valve with tamper switch:
Similar to the groove butterfly valve, but it is equipped with a tamper switch that provides feedback on the valve position.
49.Double eccentric groove butterfly valve:
This valve adopts a double eccentric design to reduce valve seat friction and wear, close more tightly, and have a longer service life.
50.Threaded Butterfly Valve with Tamper Switch:
This butterfly valve has threaded ends for easy connection to threaded pipes. It also features a tamper switch for position feedback.
51.Grooved Resilient Swing Check valve:
This type of valve is designed with grooved end connections and can be easily installed using grooved pipe fittings. It features a swing disc that opens and closes to control water flow and prevent backflow.
52.Flanged Resilient swing Check Valve:
This valve has a flange end connection and is installed by bolting to the pipe flange. It also utilizes a swing plate mechanism to regulate water flow and prevent backflow.
53.Double Door Grooved Check Valve:
This valve is designed with two swing discs that open and close simultaneously. It is typically used in applications where large volumes of water flow need to be controlled, such as fire protection systems.
54.Double-door wafer check valve:
Similar to the double-door groove check valve, this valve also has two swing discs. However, it is mounted between two flanges using bolts and nuts. It is used in applications where space is limited and a compact design is required.
55.Flanged Y-Strainer:
This valve is a strainer installed in the pipe to remove debris and particles from the water flow. It has a Y-shaped filter element that captures solid particles and prevents them from entering downstream equipment. It features flanged end connections for easy installation and maintenance.
●Material Standards For Water Valves
EN-GJS-450-10:
This is a ductile iron material with good strength and toughness, suitable for water valve applications.
ASTM A536:
This is a specification for ductile iron castings that provides guidance on the mechanical properties and chemical composition of the material.
65-45-12:
This is a ductile iron with a tensile strength of 65,000 psi, a yield strength of 45,000 psi, and an elongation of 12%. It is often used in water valve manufacturing.
AISI 304:
This is a stainless steel grade known for its corrosion resistance and excellent formability. Commonly used in water valve components that require water and chemical resistance.
AISI 316:
Another stainless steel grade, AISI 316 has higher corrosion resistance compared to AISI 304. It is commonly used in water valves in applications involving more corrosive environments.
AISI 420:
This is a martensitic stainless steel grade known for its high hardness and wear resistance. Used for water valves requiring excellent mechanical properties and wear resistance.
AISI 431:
AISI 431 is a heat-treatable martensitic stainless steel with high strength and corrosion resistance. Suitable for water valves requiring good mechanical properties and corrosion resistance.
AL-Bronze C95400:
This is an aluminum bronze alloy known for its excellent corrosion resistance and high strength. It is often used in water valves due to its durability and ability to withstand seawater and other corrosive environments.
These materials are selected based on their specific properties to ensure the valve can withstand the demands of water applications while maintaining performance and durability.
●Design Standards For Water Valves
1. BS 5163: British Standard for resilient seated gate valves for use in waterworks.
2. NSFIANSI61: NSF/ANSI 61 is a certification program for materials and components used in drinking water systems.
3. NSFIANSI 372: NSF/ANSI 372 is the standard for lead-free plumbing products, ensuring that they meet the requirements for safe drinking water.
4. AS 2638.2: Australian standard for gate, globe and check valves for water works.
5. SANS 664: South African national standard for general water valves.
6. DIN EN 1171: German standard for elastically seated gate valves for water supply.
7. BS EN 593: British Standard for Butterfly Valves.
8. ISO 5211: International standard for valve actuator installation dimensions.
9. BS EN 558: British industrial valve standard – face-to-face and center-to-face dimensions.
10. BS EN 12334: British Standard for general purpose copper alloy gate valves.
11. BS 7350: British Standard for plastic valves for water supply and drainage.
12. BS EN 13789: British industrial valve standard – Testing of metallic valves.
13. AWWA C515: American Water Works Association standard for reduced-wall elastomeric seated gate valves for water service.
14. MSS SP-67: Butterfly Valve Manufacturers Standardization Society Standard.
15. API 609: American Petroleum Institute standard for butterfly valves used in the oil and gas industry.
●Connection Standards For Water Valves
1. BS EN 1092-2:1997 – British standard for flanges and joints, which specifies the requirements for water valve flanges.
2. DIN EN 1092-2:1997 – German standard for flanges and their joints, similar to BS EN 1092-2.
3. AS4087/AS2129 – Australian standard for flanges and joints, which specifies the requirements for water valve flanges.
4. ISO 7-1 – International standard for pipe threads, especially tapered threads for water valve connections.
5. SANS 1123 PN10/16 – South African national standard for flanges and joints, stipulating the requirements for water valve flanges.
6. BS EN 1092 PN10/PN16 – British standard for flanges and joints, which specifies the requirements for water valve flanges.
7. AS 2129 TABLE E – Australian Standard for Flanges and Connections, specifies requirements for water valve flanges.
8. JIS B2212 10K – Japanese Industrial Standard for Flanges and Their Joints, stipulating requirements for water valve flanges.
9. BS 10 Table D/E – British Standard for Flanges and Connections, specifies requirements for water valve flanges.
10. ISO 6182 – International standard for fire protection valves, specifies the requirements for water valves used in fire protection systems.
11. ASTM A888 – American Society for Testing and Materials Standard for Hubless Cast Iron Soil Pipe and Fittings, specifies requirements for drainage systems.
12. ASME B16.1 CL 125 – American Society of Mechanical Engineers Standard for Cast Iron Pipe Flanges and Flange Fittings, specifies requirements for water valve flanges.
13. ANSI/AWWA C153/A21.53 – American National Standards Institute/American Water Works Association Ductile Iron Compact Fitting Standard, specifies requirements for water valve fittings.
14. ASME B1.20.1 – American Society of Mechanical Engineers pipe thread standard, specifies requirements for water valve connections.
15. ISO 5211 – International standard for valve actuator installation, which specifies the requirements for the installation interface between the valve and actuator.
●Surface Treatment Standards Of Water Valves
1. ANSI/AWWA C550: This is a standard developed by the American National Standards Institute (ANSI) and the American Water Works Association (AWWA). It provides guidance on the design, construction, testing, and performance of concealed stem elastomeric seated gate valves, including materials, dimensions, pressure ratings, and testing procedures.
2. AS4158: This is an Australian standard developed by Standards Australia. It specifies the requirements for resilient seated gate valves used in water supply and wastewater treatment applications. It covers valve design, materials, dimensions, pressure ratings, testing and marking.
3. SANS 664: This is the South African national standard developed by the South African Bureau of Standards (SABS). It specifies the requirements for resilient seated gate valves used in water supply applications. The standard covers valve design, materials, dimensions, pressure ratings, testing and marking.
These standards ensure that water valves meet certain quality and performance standards, ensuring they are suitable for use in water and wastewater systems. Complying with these standards helps ensure safe, reliable and efficient water valve operation.
●Other Standards
PN10/16, PN25, 300PSI, 175PSI, 200PSI, and 250PSI are pressure ratings that indicate the maximum pressure a water valve can handle.
- – PN10/16: This refers to valves that can handle pressures of 10 or 16 bar, which equates to approximately 145 or 232 PSI respectively.
- – PN25: This indicates a pressure rating of 25 bar, which is approximately 363 PSI.
- – 300PSI: This rating means the valve can handle 300 pounds per square inch.
- – 175PSI: This rating means the valve can handle 175 pounds per square inch.
- – 200PSI: This rating means the valve can handle 200 pounds per square inch.
- – 250PSI: This rating means the valve can handle 250 pounds per square inch.
These pressure ratings are important to ensure that the valve is suitable for the specific application and can withstand the water pressure flowing through the valve without any leakage or damage.