Water Valves

Water valves are used in potable water networks, irrigation systems, pump stations, storage tanks, industrial water circuits, fire protection lines, and water treatment installations. Selection should be based on DN, PN or ANSI Class, required flow rate, flow velocity, available differential pressure, water quality, solids content, network hydraulic profile, and the required function: isolation, regulation, non-return, air release, or surge protection.

Automatic control valves for water service include pressure reducing valves, pressure sustaining valves, pressure relief valves, flow control valves, level control valves, solenoid-controlled valves, and pump control valves. For pressure reducing duty, key selection parameters include upstream/downstream pressure ratio (p₁/p₂), set-point range, Kvs/Cv, stability under variable demand, pressure loss, and cavitation risk. Available constructions typically cover PN10, PN16, PN25, PN40, and PN64, with BSP, NPT, or flanged connections, in cast iron, ductile iron, and stainless steel.

Drain and air release valves are used to discharge air during pipeline filling, normal operation, and draining, and to limit vacuum formation during transient events. In large water networks, the correct placement of air valves at high points, pump stations, and long rising mains directly affects flow loss, noise, corrosion, and water hammer behaviour.

Backflow prevention devices are installed where reverse flow toward the supply side or toward a cleaner section of the network must be prevented. Selection depends on contamination risk, installation point, operating pressure, and whether periodic testing and maintenance access are required.

Surge control valves and specialised air valves are applied to limit rapid pressure changes during pump start/stop, sudden flow variation, or fast valve closure. Available executions include DIN and ANSI patterns, pressure classes PN10 to PN40 and Class 150, with materials such as ductile iron, duplex stainless steel, and super duplex stainless steel for industrial water and seawater service.

Pressure reducing valves

Differential Pressure Regulating Valves

Pressure Relief / Sustaining

Pressure management control valves

Anti-Surge Valves

Flow control valves

Level control valves

Solenoid control valves

Hydraulic Pump Control Valves

Back flow preventers

Check Valves

Bleeding & Venting

Anti-shock/anti-slam air valves

Penstock Valves

Showing 1-24 of 189 item(s)

Silent Globe Check Valve - 581 | Cla-Val

Cla-Val

Cla-Val 581 Silent Globe Check Valve The Cla-Val 581 is a silent globe-type check valve designed for water distribution networks and pump stations. The spring-loaded disc closes prior to flow reversal, minimizing hydraulic shock and water hammer events. Technical Specifications Body: Ductile iron ASTM A536 65-45-12 Seat / Disc: Stainless steel 304...

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Two-Door Wafer Check Valve - 582 | Cla-Val

Cla-Val

Cla-Val 582 Two-Door Wafer Check Valve The Cla-Val 582 is a dual-plate wafer check valve designed for water distribution systems. It is installed between ANSI flanges and utilizes torsion springs to ensure both plates close prior to reverse flow, minimizing hydraulic shock (water hammer). Construction Body: Ductile iron ASTM A536 65-45-12 Plates:...

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Series Foot Valve - 583 | Cla-Val

Cla-Val

Cla-Val 583 Series “Tite Seal” Foot Valve The Cla-Val 583 is a foot check valve designed for pump suction lines, featuring ANSI flanged connections and a ductile iron body per ASTM A536. Its primary function is to maintain pump priming and prevent backflow into the suction line during pump shutdown. Sealing Mechanism The 583 Series utilizes a “Tite Seal”...

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Flex-Check Valve - 584 | Cla-Val

Cla-Val

Cla-Val 584 Flex-Check Valve The Cla-Val 584 is a flex-check type non-return valve designed for potable and process water networks. The flexible disc opens with forward flow and returns to the seat upon reverse flow, providing drop-tight shutoff. Suitable for applications requiring reliable backflow prevention and minimal leakage. Operating Principle The...

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Surge Blocker - 587 | Cla-Val

Cla-Val

Cla-Val 587 Surge Blocker Check Valve The Cla-Val 587 Surge Blocker is a hydraulically actuated check valve engineered for transient pressure control in water transmission pipelines. It is typically installed in pump stations and long-distance water mains where pump trip or rapid flow changes can induce hydraulic shock and pressure surges. Operating...

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Check Valve - 81-01 & 681-01 | Cla-Val

Cla-Val

Cla-Val 81-01 / 681-01 Check Valve The Cla-Val 81-01 / 681-01 is a hydraulically operated, no-slam check valve designed for water distribution systems. The valve opens when inlet pressure exceeds outlet pressure and closes tightly upon pressure reversal, minimizing hydraulic shock. Operation Downstream pressure is routed to the cover chamber via control...

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Check Valve - 81-02 & 681-02 | Cla-Val

Cla-Val

Cla-Val 81-02 / 681-02 Check Valve The Cla-Val 81-02 / 681-02 is a hydraulically operated, no-slam check valve with dual speed controls, designed for water distribution systems. The valve opens when inlet pressure exceeds downstream pressure and closes drip-tight upon pressure reversal, preventing backflow. Operation Downstream pressure is routed to the...

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Check Valve - 81-12 | Cla-Val

Cla-Val

Cla-Val 81-12 / 681-12 Check Valve The Cla-Val 81-12 / 681-12 is a hydraulically operated, no-slam check valve designed for water distribution systems. The valve opens when inlet pressure exceeds downstream pressure and closes drip-tight upon pressure reversal, preventing backflow and water hammer. Operation Downstream pressure is routed to the cover...

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Check Valve - 81-18 | Cla-Val

Cla-Val

Cla-Val 81-18 Check Valve The Cla-Val 81-18 is a hydraulically operated, no-slam check valve designed for water distribution networks. The valve opens when inlet pressure exceeds downstream pressure and achieves drip-tight closure upon pressure reversal, preventing backflow. Operation Downstream pressure is routed to the cover chamber via control tubing....

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