Minimum Flow Recirculation Valve
Product Introduction An automatic recirculation valve, sometimes called a pump protection valve or minimum flow valve, is installed on the outlet of the centrifugal pump discharge line. Its purpose is to prevent the pump from overheating by ensuring that there is always a minimum flow through the pu
Product Introduction
An automatic recirculation valve, sometimes called a pump protection valve or minimum flow valve, is installed on the outlet of the centrifugal pump discharge line. Its purpose is to prevent the pump from overheating by ensuring that there is always a minimum flow through the pump. They have replaced traditional multi-valve pump protection solutions. The XURI minimum flow recirculation valve combines three important functions of a pump protection system:
No-return feature in the main line to prevent the medium from flowing backwards to the pump
Automatic bypass control ensures minimum flow is allowed back to the pump during periods of low demand
Pressure relief feature ensures that the recirculating medium remains at the correct pressure to avoid flashing and cavitation
Once the pump produces sufficient flow, the minimum flow valve opens, moving the internal valve disc in the main line to the open position. The reduction in flow causes the spring-loaded disc to return to its seat, closing the process outlet. At the same time, the bypass outlet is uncovered, allowing a minimum flow of liquid to be routed (or recirculated) back to the pump.
The automatic recirculation valve is a multifunctional valve. The minimum flow recirculation valve ensures that a predetermined minimum flow is always delivered through the centrifugal pump. So the automatic recirculation valve is basically a pump protection device. These valves perform a very important function in order to avoid permanent damage from cavitation and overheating.
The minimum flow recirculation valve
Design features
Reduction volt age of multistage vortex and orifice plate Separation of sealing and throttle down
Hardening treatment of internal parts
Diameter: 2 “-8”
Presure: ANSI 1500LB-3500LB
Body material: A 105, WB36, F91, F92, WCB, WC6, WC9 Mode of operation: electric, pneumatic
Product Overview - XURI Valve
Minimum flow recirculation valve for pump protection in power and process plants. Designed for high-pressure letdown and cavitation control. Suitable for boiler feedwater pumps and critical high-energy pump protection applications.
Factory direct control valve manufacturer, OEM/ODM custom trim available. ISO 9001 certified, fast delivery for process control and power generation projects.
Available Configurations
- Sizes: DN15 - DN400 (1/2" - 16")
- Pressure Ratings: Class 150 - Class 2500 (PN16 - PN420)
- Body Materials: WCB, WCC, LCB, LCC, WC6, WC9, CF8, CF8M, CF3, CF3M, A105, F22, F304, F316
- End Connections: Flanged (RF, RTJ), Butt Weld, Socket Weld, Threaded (NPT)
- Operation: Manual (Handwheel), Gearbox, Pneumatic, Electric
- Body Patterns: T-Pattern, Y-Pattern, Angle-Pattern
- Disc Types: Conventional Disc, Needle Disc, Plug Type Disc, Ball Bearings Disc
- Standards: ASME B16.34, BS 1873, API 602, NACE MR0175
Specifications
| 压力等级 (Pressure Rating) | 1500LB |
|---|---|
| 阀体材质 (Body Material) | Carbon & Alloy Steel (WCB, WC6, WC9, A105, WB36, F91, F92) |
| 适用介质 (Applicable Media) | Water, Oil, Gas, Steam |
| 连接方式 (End Connection) | Flanged / Threaded / Welded |
| 驱动方式 (Operation Type) | Pneumatic / Automatic |
| 应用领域 (Applications) | Petroleum, Chemical, Power |
