Hydraulic Control Slow Closed Butterfly Valve

Whether our API6D Flange Slab Gate Valve, High Temperature High Pressure Globe Valve, Double Disc Wedge Type Gate Valve is standard design or customized according to customers' needs, it is known all over the world for its high performance, high reliability and innovation. Based on the concept of sincere production and management, we serve our customers wholeheartedly, and strive to achieve high quality, high efficiency, preferential prices and good service. From the beginning of product research and development to the transformation of the product into the application, the core team has made great efforts step by step.

Minimum flow circulation valve is the key supporting equipment of power plant’s boiler feedwater pump.

Boiler water from the feedwater pump will be pressurized up to 20-30Mpa or above in the deaerator then sent to the high pressure heater and eventally into the boiler. A certain minimum flow quantity of the feedwater pump should be ensured to take away the heat generated by its operation so as to avoid overheating and damage of vanes due to cavitation. Boiler feedwater flow is small during the startup and shutdown process while the water demand decreases in condition of breakdown. In order to ensure the normal operation of the pump, a recirculation system should be mounted in the pump outlet to carry a portion of the feedwater back to the deaerator from the pump.

Technical Specification of Pressure Reducing Control Valves

Valve Type: Globe type control valve

Valve Size:1 inch to 12 inch

Pressure: 150Lb to 4500LB

Flange Connection: 150LB to 2500LB according to ASME B 16.50

Butt Welding Connection: 150LB TO 4500LB according to ASME B 16.25

Design according to ASME B16.34

Operation: electric or pneumatic

Our Advantages:

1.Structure: Circulatory convection, multi-stage pressure reducing mechanism, avoid cavitation efficiently, prolong service life.

2. Replaceable Trim: All the trim can be quickly removed and replaced, easy to maintain with less cost

3. Packing: High-quality stem packing ensures zero leak without frequent replacement

4. Well Performance: Scientific construction, high-performance materials with exquisite workmanship enable both the plug and cage to have excellent anti-blocking and anti-scrach performance.

5. Matched Material: Appropritely matched plug and cage materials provide an excellent resistance for abrasion and scraching.

6. Leakage Class: Zero leakage, long-service life and low breakdown rate ensure a safe and reliable operation.

Our Hydraulic Control Slow Closed Butterfly Valve is completely independent research and development, therefore it can be guaranteed that there will be absolutely no intellectual property issues. Relying on superb technology, advanced equipment, strict management, fine manufacturing technology, stable quality, high-quality service, and ensuring on-time delivery, we have won the reliance and praise of our customers. Our highly specialized process eliminates the component failure and offers our customers unvarying quality, allowing us to control cost, plan capacity and maintain consistent on time delivery.