Di F4 Flanged Gate Valve Dn50 Dn70 Dn100

Since our establishment, we have adhered to the road of technological innovation, continuously committed to the research and development of boiler feedpump recirculation valve, flanged floating ball valve, Non Return Check Valve 300LB, and invested a lot of money in technology, equipment and modern management. We always take integrity, unity, efficiency, and innovation as our business tenet, and serve global customers wholeheartedly for a better future! With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in public placesand other industries. Our technical level and quality assurance enable our products to continuously win the trust and favor of overseas customers.

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 merchandise are commonly recognized and reliable by customers and can meet constantly developing economic and social desires for Di F4 Flanged Gate Valve Dn50 Dn70 Dn100. With reasonable prices and excellent services, we have established long-term cooperative relations with many companies. Integrity management, considerate logistics, high-quality products, and a harmonious and pleasant working atmosphere are what we have always been pursuing.