Wafer Check Valve
The wafer check valve is a general‑purpose one‑way fluid valve. It features light weight and compact size, easy to install between flanges. Internally, it consists of two semicircular springs and discs fixed to the valve body by pins. The deformation of springs closes the disc while fluid pressure opens it. Fast spring deformation protects pipelines from water hammer damage.
Working Principle
Spring‑loaded wafer check valve is a compact high‑performance non‑return valve designed to prevent reverse flow in piping systems requiring fast closure and minimum pressure drop. With spring‑assisted disc and wafer‑style design, it ensures instant sealing upon flow reversal, which makes it ideal for water‑hammer prevention and space‑saving applications.
Manufactured from stainless steel and carbon steel, wafer check valves are durable and corrosion‑resistant, suitable for water, steam, oil and gas systems. Its lightweight design simplifies installation and reduces system weight, while spring mechanism improves reliability under dynamic flow conditions.
Structural Features
Spring‑assisted Closure: Integrated spring ensures fast disc closure to minimize risks of water hammer and backflow. Efficient cracking pressure as low as 0.1 psi for effective operation.
Wafer‑type Design: Compact and lightweight, ideal for space‑limited installation. Mounted between flanges without extra bolts or gaskets.
Low Flow Resistance Design: Optimized flow path minimizes pressure drop and energy consumption. Suitable for high‑flow systems such as HVAC and water distribution networks.
Durable Construction: Body materials: Stainless steel (ASTM A351 CF8M), carbon steel (ASTM A216 WCB) or ductile iron (EN‑GJS‑400‑18). Internals: stainless steel disc and spring for corrosion resistance.
Compliance: Complies with industrial application standards API 594, ASME B16.34 and ISO 17292.
Why Choose Us
Proven Reliability: Trusted for HVAC, water treatment and industrial systems.
Global Compliance: Meets API, ASME and ISO standards for international projects.
Custom Solutions: Optional coatings (Epoxy, PTFE) or high‑temperature materials (Inconel).
Fast Delivery: Global shipping within 7 days for stocked standard sizes.
Application Fields
Pharmaceutical plants, water works, sewage treatment plants, petrochemical industry, paper mills, food processing factories
Main Parts Material
| Model | Valve Body | Disc | Spring |
| H71H‑16Q、H71H‑25Q | QT400‑15 | 25 | 50CrCA |
| H71W‑25H、H71W‑40H | 2Cr13 | 1Cr13 | 1Cr18Ni9Ti |
| H71W‑16P、H71W‑25P | ZG1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
Main Performance Specifications
| Model | Nominal Pressure PN (MPa) | Shell Test Pressure PS (MPa) | Seal Test Pressure PS (MPa) | Working Temperature (℃) | Applicable Media |
| H71W‑16T | 1.6 | 2.4 | 1.76 | ≤200 | Water, steam, oil products, etc. |
| H71H‑25Q | 2.5 | 3.75 | 2.75 | ≤235 | Water, steam, oil products, etc. |
| H71W‑25H | 2.5 | 3.75 | 2.75 | ≤300 | Water, steam, oil products, etc. |
| H71W‑25P | 2.5 | 3.75 | 2.75 | ≤200 | Corrosive media such as nitric acid |
| H71W‑40H | 4.0 | 6.0 | 4.4 | ≤300 | Water, steam, oil products, etc. |
| H71W‑40P | 4.0 | 6.0 | 4.4 | ≤200 | Corrosive media such as nitric acid |
Main Overall Dimensions
| DN(mm) | L | D | D1 | D3 | D2 | WT (Kg) |
| 15 | 28 | 52 | 15 | 44 | 25 | 0.12 |
| 20 | 28 | 62 | 19 | 52 | 30 | 0.25 |
| 25 | 30 | 72 | 24 | 60 | 36 | 0.34 |
| 32 | 35 | 83 | 31 | 72 | 43 | 0.53 |
| 40 | 40 | 93 | 39 | 74 | 52 | 0.80 |
| 50 | 45 | 107 | 48 | 98 | 62 | 1.2 |
| 65 | 56 | 124 | 63 | 117 | 75 | 2.2 |
| 80 | 60 | 138 | 78 | 128 | 90 | 3.1 |
| 100 | 70 | 162 | 98 | / | 112 | 5.7 |
| 125 | 80 | 190 | 123 | / | 132 | 10 |
| 150 | 100 | 220 | 148 | / | 158 | 14 |
| 200 | 110 | 270 | 198 | / | 208 | 24 |
| 250 | 132 | 328 | 248 | / | 208 | 35 |
