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
Pressure reducing valves
Differential Pressure Regulating Valves
Differential Pressure Regulating Valves
Pressure Relief / Sustaining
Pressure Relief / Sustaining
Pressure management control valves
Pressure management control valves
Anti-Surge Valves
Anti-Surge Valves
Flow control valves
Flow control valves
Level control valves
Level control valves
Solenoid control valves
Solenoid control valves
Back flow preventers
Back flow preventers
Bleeding & Venting
Bleeding & Venting
Anti-shock/anti-slam air valves
Anti-shock/anti-slam air valves
Penstock Valves
Penstock Valves
Automatic control valves - Flow control - XLC 330/430 PN 25 | CSA - CSA

Automatic control valves - Flow control - XLC 330/430 PN 25 | CSA

Automatic control valves - Flow control - XLC 330/430 PN 25 | CSA
CSA
CSA XLC 330/430 PN25 – Flow Control Valve The CSA XLC 330/430 is a hydraulically actuated, automatic globe-type control valve designed to limit flow to a preset value, independent of upstream or downstream pressure fluctuations. When actual flow is below the setpoint, the valve remains fully open. Suitable for water distribution and process applications...
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Automatic control valves - Flow control - XLC 331/431 PN 25 | CSA - CSA

Automatic control valves - Flow control - XLC 331/431 PN 25 | CSA

Automatic control valves - Flow control - XLC 331/431 PN 25 | CSA
CSA
CSA XLC 331/431 PN25 The CSA XLC 331/431 is a hydraulically actuated globe valve designed for simultaneous downstream pressure reduction and flow limitation to a preset maximum value. It maintains stable downstream pressure regardless of demand fluctuations, while the pilot circuit restricts excess flow. Operation Valve integrates: pressure reducing...
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Automatic control valves - Flow control - XLC 334/434 PN 16/25 | CSA - CSA

Automatic control valves - Flow control - XLC 334/434 PN 16/25 | CSA

Automatic control valves - Flow control - XLC 334/434 PN 16/25 | CSA
CSA
CSA XLC 334/434 PN16/25 The CSA XLC 334/434 is a hydraulically actuated globe valve designed for minimum/maximum tank level control with integrated maximum flow limitation. Regulation is achieved via a pilot circuit, without the use of electric actuators. Operation The valve opens and closes according to preset tank level limits. During opening, it...
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Automatic control valves - Flow control - XLC 335/435 PN 25 | CSA - CSA

Automatic control valves - Flow control - XLC 335/435 PN 25 | CSA

Automatic control valves - Flow control - XLC 335/435 PN 25 | CSA
CSA
CSA XLC 335/435 PN25 The CSA XLC 335/435 is an automatic flow control valve with solenoid-operated open/close command. It maintains a preset flow rate regardless of upstream pressure fluctuations. When flow is below the setpoint, the main valve remains fully open. Designed for process water and compatible with treated water up to 70°C. Operation Flow...
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Automatic control valves - Flow control - XLC 380/480 PN 16/25 | CSA - CSA

Automatic control valves - Flow control - XLC 380/480 PN 16/25 | CSA

Automatic control valves - Flow control - XLC 380/480 PN 16/25 | CSA
CSA
CSA XLC 380/480 PN16/25 The CSA XLC 380/480 is an automatic excess flow shut-off valve. It remains fully open as long as flow is below the set threshold and closes completely if a sudden increase in flow above the set point is detected. Manual reset is required after closure. This design is intended for process protection rather than continuous flow...
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Automatic control valves - Level control - XLC 324/424 PN 16 | CSA - CSA

Automatic control valves - Level control - XLC 324/424 PN 16 | CSA

Automatic control valves - Level control - XLC 324/424 PN 16 | CSA
CSA
CSA XLC 324/424 PN16 Level Control Valve The CSA XLC 324/424 is a hydraulically actuated globe-type valve designed for minimum/maximum tank level control with simultaneous upstream pressure sustaining. When upstream pressure drops below the setpoint, the valve throttles flow to maintain supply to higher pressure zones. Technical Data Body/cover: ductile...
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Automatic control valves - Level control - XLC 326/426 PN 16 | CSA - CSA

Automatic control valves - Level control - XLC 326/426 PN 16 | CSA

Automatic control valves - Level control - XLC 326/426 PN 16 | CSA
CSA
CSA XLC 326/426 PN16 Proportional Level Control Valve The CSA XLC 326/426 is a hydraulically actuated level control valve equipped with a proportional level pilot MCP constructed from stainless steel. It maintains a constant tank level while sustaining upstream pressure above a preset minimum. Designed for water supply systems requiring precise level...
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Automatic control valves - Level control - XLC 334/434 PN 16/25 | CSA - CSA

Automatic control valves - Level control - XLC 334/434 PN 16/25 | CSA

Automatic control valves - Level control - XLC 334/434 PN 16/25 | CSA
CSA
CSA XLC 334/434 PN16/25 Level Control Valve with Flow Limitation The CSA XLC 334/434 is a hydraulically actuated globe-type control valve designed for minimum/maximum tank level regulation with integrated maximum flow limitation at a preset setpoint, independent of upstream pressure fluctuations. This configuration is suitable for process applications...
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Automatic control valves - Level control - XLC 340/440 PN 16 | CSA - CSA

Automatic control valves - Level control - XLC 340/440 PN 16 | CSA

Automatic control valves - Level control - XLC 340/440 PN 16 | CSA
CSA
CSA XLC 340/440 PN16 Min-Max Level Control Valve The CSA XLC 340/440 is a hydraulically actuated globe control valve designed for minimum and maximum tank level control. It regulates tank filling independently of upstream pressure fluctuations, with an adjustable differential level range up to 4 m. Operation The valve opens when the liquid level drops to...
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Automatic control valves - Level control - XLC 360/460-MCP PN 16 | CSA - CSA

Automatic control valves - Level control - XLC 360/460-MCP PN 16 | CSA

Automatic control valves - Level control - XLC 360/460-MCP PN 16 | CSA
CSA
CSA XLC 360/460-MCP PN16 Proportional Level Control Valve The CSA XLC 360/460-MCP is a hydraulically actuated globe control valve designed for water tank level regulation. Equipped with a proportional MCP pilot in stainless steel, it maintains a constant setpoint level regardless of upstream pressure fluctuations. Suitable for process water and potable...
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Automatic control valves - Level control - XLC 360/460-Rotoway-P PN 16/25 | CSA - CSA

Automatic control valves - Level control - XLC 360/460-Rotoway-P PN 16/25 | CSA

Automatic control valves - Level control - XLC 360/460-Rotoway-P PN 16/25 | CSA
CSA
CSA XLC 360/460-Rotoway-P PN16/25 The XLC 360/460-Rotoway-P is a hydraulically actuated globe valve designed for constant tank level control. Regulation is achieved via a three-way stainless steel pilot, operating independently of upstream pressure fluctuations. Suitable for process water and compatible with industrial water treatment systems. Technical...
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Automatic control valves - Level control - XLC 365/465-MCP PN 16/25 | CSA - CSA

Automatic control valves - Level control - XLC 365/465-MCP PN 16/25 | CSA

Automatic control valves - Level control - XLC 365/465-MCP PN 16/25 | CSA
CSA
CSA XLC 365/465-MCP PN16/25 The XLC 365/465-MCP is a proportional level control valve for water storage tanks, equipped with an additional on-off solenoid actuator. It maintains a constant tank level via a stainless steel MCP proportional pilot and allows remote shutoff or override through electrical signal or controller input. Technical Data Body/cover:...
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Automatic control valves - Level control - XLC 370/470 PN 16/25 | CSA - CSA

Automatic control valves - Level control - XLC 370/470 PN 16/25 | CSA

Automatic control valves - Level control - XLC 370/470 PN 16/25 | CSA
CSA
CSA XLC 370/470 PN16/25 Altitude Control Valve The XLC 370/470 is a hydraulically actuated globe control valve designed for maintaining constant water level in reservoirs or water towers. Level regulation is achieved via a high-sensitivity pilot, providing proportional control with accuracy within a few centimeters of water column, minimizing abrupt...
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Automatic control valves - Level control - XLC 370/470-D PN 16 | CSA - CSA

Automatic control valves - Level control - XLC 370/470-D PN 16 | CSA

Automatic control valves - Level control - XLC 370/470-D PN 16 | CSA
CSA
CSA XLC 370/470-D PN16 Level Control Valve with Fast Discharge Function The CSA XLC 370/470-D is a hydraulically actuated globe-type control valve for tank level regulation via hydrostatic pressure, equipped with an integrated fast discharge mechanism for the control chamber. This configuration enables faster main valve response to level changes compared...
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Automatic control valves - Pressure management - XLC 310/410-ND PN 16/25 | CSA - CSA

Automatic control valves - Pressure management - XLC 310/410-ND PN 16/25 | CSA

Automatic control valves - Pressure management - XLC 310/410-ND PN 16/25 | CSA
CSA
CSA XLC 310/410-ND PN16/25 Dual Setpoint Pressure Reducing and Stabilizing Valve The CSA XLC 310/410-ND is a hydraulically actuated globe-type control valve designed for potable water distribution networks. It enables downstream pressure reduction and stabilization at two independently adjustable setpoints. Switching between setpoints is achieved via...
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Automatic control valves - Pressure management - XLC 310/410-ND-H PN 16 | CSA - CSA

Automatic control valves - Pressure management - XLC 310/410-ND-H PN 16 | CSA

Automatic control valves - Pressure management - XLC 310/410-ND-H PN 16 | CSA
CSA
CSA XLC 310/410-ND-H PN16 The CSA XLC 310/410-ND-H is a hydraulically operated globe-type pressure reducing valve designed for potable water networks. It features two independently adjustable downstream pressure setpoints, with automatic switching based on flow rate within a configurable range. Transition between setpoints is not time-based but determined...
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Automatic control valves - Pressure management - XLC 310/410-ND-P PN 16 | CSA - CSA

Automatic control valves - Pressure management - XLC 310/410-ND-P PN 16 | CSA

Automatic control valves - Pressure management - XLC 310/410-ND-P PN 16 | CSA
CSA
CSA XLC 310/410-ND-P PN16 The CSA XLC 310/410-ND-P is a hydraulically operated globe-type pressure reducing valve for water distribution networks, designed for dual downstream pressure setpoints. The ND-P variant integrates a Bluetooth programmer for remote adjustment and features an IP68-rated enclosure. Operation This valve maintains stable downstream...
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Automatic control valves - Pressure management - XLC 353/453 PN 16/25 | CSA - CSA

Automatic control valves - Pressure management - XLC 353/453 PN 16/25 | CSA

Automatic control valves - Pressure management - XLC 353/453 PN 16/25 | CSA
CSA
CSA XLC 353/453 PN16/25 The CSA XLC 353/453 is a hydraulically actuated globe valve with stepwise opening/closing via solenoid valves. It is specified where remote position control is required, using a CSA controller, PLC, or SCADA/telemetry system. Operation The hydraulic circuit is actuated by solenoid valves, enabling controlled adjustment of the valve...
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Automatic control valves - Pressure reducing - XLC 300/400-DC-PR PN 16/25 | CSA - CSA

Automatic control valves - Pressure reducing - XLC 300/400-DC-PR PN 16/25 | CSA

Automatic control valves - Pressure reducing - XLC 300/400-DC-PR PN 16/25 | CSA
CSA
CSA XLC 300/400-DC-PR PN16/25 Proportional Pressure Reducing Valve The CSA XLC 300/400-DC-PR is a hydraulically operated, double-chamber, proportional pressure reducing valve designed for potable water networks and industrial installations requiring downstream pressure stabilization via a preset reduction ratio. The double-chamber configuration enhances...
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Automatic control valves - Pressure reducing - XLC 310/410 PN 25 | CSA - CSA

Automatic control valves - Pressure reducing - XLC 310/410 PN 25 | CSA

Automatic control valves - Pressure reducing - XLC 310/410 PN 25 | CSA
CSA
CSA XLC 310/410 PN25 Pressure Reducing Valve The CSA XLC 310/410 is an automatic, hydraulically operated pressure reducing valve for water distribution networks. It is engineered to maintain a constant downstream pressure regardless of upstream pressure or flow fluctuations. Operation is based on a pilot control system that continuously modulates the main...
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Automatic control valves - Pressure reducing - XLC 310/410-DC PN 25 | CSA - CSA

Automatic control valves - Pressure reducing - XLC 310/410-DC PN 25 | CSA

Automatic control valves - Pressure reducing - XLC 310/410-DC PN 25 | CSA
CSA
CSA XLC 310/410-DC PN25 Hydraulically operated globe-type pressure reducing valve for downstream pressure stabilization, independent of upstream pressure or flow fluctuations. Designed for potable water networks, industrial water supply, and equipment protection lines against overpressure. Technical Description The XLC 310/410-DC utilizes a...
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Automatic control valves - Pressure reducing - XLC 310/410-G PN 25 | CSA - CSA

Automatic control valves - Pressure reducing - XLC 310/410-G PN 25 | CSA

Automatic control valves - Pressure reducing - XLC 310/410-G PN 25 | CSA
CSA
CSA XLC 310/410-G PN25 The CSA XLC 310/410-G is a hydraulically operated globe-type pressure reducing valve, equipped with an additional downstream overpressure pilot. It maintains a constant downstream set pressure and limits pressure rise above the setpoint. Operation The pilot circuit regulates the main valve chamber based on downstream pressure. The...
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Automatic control valves - Pressure reducing - XLC 310/410-M PN 25 | CSA - CSA

Automatic control valves - Pressure reducing - XLC 310/410-M PN 25 | CSA

Automatic control valves - Pressure reducing - XLC 310/410-M PN 25 | CSA
CSA
CSA XLC 310/410-M PN25 The CSA XLC 310/410-M is a hydraulically operated globe-type pressure reducing valve, equipped with a CSA AMS electric actuator for remote or automated set point adjustment via input signal. It is specified where downstream pressure must be modulated remotely or integrated into process automation systems. Operation The pilot...
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Automatic control valves - Pressure reducing - XLC 310/410-ND PN 16/25 | CSA - CSA

Automatic control valves - Pressure reducing - XLC 310/410-ND PN 16/25 | CSA

Automatic control valves - Pressure reducing - XLC 310/410-ND PN 16/25 | CSA
CSA
CSA XLC 310/410-ND PN16/25 The CSA XLC 310/410-ND is a hydraulically operated globe-type pressure reducing valve with two preset, adjustable downstream pressure set points. It is specified for water distribution networks requiring dual set points (typically day/night) to optimize pressure management and reduce water losses. Operation Switching between set...
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Water Valves