| Availability: | |
|---|---|
| Quantity: | |
H77
NIPO
A dedicated check valve solution for harsh operating conditions—featuring large diameter, low pressure drop, and high reliability. Through an external swash plate and gravity-assisted structure, it achieves precise and smooth control of medium backflow, making it particularly suitable for low-pressure, high-flow pipeline systems or those requiring slow closing to prevent impact.
Efficient Backflow Prevention to Protect Core Equipment
Installed at the outlet of pumps and compressors, it prevents equipment reversal damage caused by medium backflow during shutdown.
Intelligent Energy Dissipation to Eliminate Water Hammer Hazards
Through the adjustable slow-closing function of the counterweight, it decelerates at the final stage of valve closure, gradually cuts off backflow, and effectively absorbs pipeline impact energy to protect pipelines and accessories.
Energy-Saving Preferred Choice for High-Flow Transmission Systems
Full-port design ensures minimal pressure loss, suitable for energy-sensitive systems such as water supply, power plant circulating water, and petrochemical process pipelines.
Adaptable to Special Media and Operating Conditions
Highly resistant to particle-containing, high-viscosity, or corrosive media, commonly used in environments like mines, sewage treatment, and offshore platforms.
Design Basis | GB | API/ASME | |
Design Standard | GB/T 21387 | API6D ASME B16.34 | |
Face-to-Face | GB/T 12221 | API6D ASME B16.10 | |
Connection End | FLANGE | GB/T 9113 | ASME B16.5 |
Materials | NACE MRO175 | ||
Test and Check | GB/T 26480 | API598 | |
The valve connection end standard designed and manufactured according to user requirements. | |||
Main Parts and Materials Conventional Type
Part Name | Carbon Steel | Low Temp Steel | Stainless Steel | |||
GB | ASTM | GB | ASTM | GB | ASTM | |
Body | WCB | A216-WCB | LCB LCC | A352-LCB A352-LCC | CF8 CF8M | A351-CF8 A351-CF8M |
Disc | WCB | A216-WCB | LCB LCC | A352-LCB A352-LCC | CF8 CF8M | A351-CF8 A351-CF8M |
Guiding part | WCB | A216-WCB | LCB LCC | A352-LCB A352-LCC | CF8 CF8M | A351-CF8 A351-CF8M |
Sleeve | 12Cr18Ni9 | SS304 | 12Cr18Ni9 00Cr17Ni12Mo2 | SS304 | 12Cr18Ni9 00Cr17Ni12Mo2 | SS304 SS316 |
Spring | SS304、SS316、InconelX-750 | |||||