Description
Buy Wafer Check Valve H76/H71 PN1.6-PN2.5 Stainless Steel Dual/Single Disc Type
The Wafer Check Valve H76/H71, manufactured under the trusted VALVEHU brand, is an efficient and compact non-return valve engineered for industrial applications requiring minimal pressure loss and high flow efficiency. Available in both dual plate (H76) and single plate (H71) configurations, this stainless steel check valve is suitable for use in various pipeline systems operating at pressure classes PN1.0, PN1.6, and PN2.5 MPa.
Designed according to API 6D and API 594, and compatible with international flange and testing standards like ASME B16.5, B16.47, and API 598, this valve ensures reliable performance and global usability. The H76 model features a space-saving wafer body with a double-door disc design, ideal for backflow prevention in both horizontal and vertical installations. The H71 version, with a single disc, is ideal for lighter-duty applications with similar flow and pressure needs.
With a compact structure and lightweight form factor, these valves are favored in industries such as HVAC, water treatment, petrochemical, and power generation. The stainless steel body enhances corrosion resistance, while precision machining guarantees tight sealing and minimal maintenance. Dimensions range from DN50 to DN1200, providing wide compatibility with multiple pipeline sizes.
Whether you need robust backflow prevention or a low-profile check valve to fit tight spaces, this wafer-type valve is engineered for long-term reliability. For expert guidance and to find the right valve for your system, contact the VALVEHU technical team in China. We are ready to assist you in selecting a solution that fits your exact needs.
Technical Specifications
- Valve Type: Wafer Check Valve (Dual/Single Plate)
- Models: H76 (Dual Disc), H71 (Single Disc)
- Pressure Ratings: PN1.0, PN1.6, PN2.5 MPa
- Body Material: Stainless Steel
- Design Standard: API 6D, API 594 / GB/T12238
- Testing Standard: API 598 / JB/T 9092, GB/T 13927
- Face-to-Face: API 6D / Factory Standard
- Flange Compatibility: ASME B16.5, B16.47 / GB/T9113, GB/T9124
- Nominal Sizes: DN50 to DN1200
- Application: Water, steam, gas, chemical pipelines
Technical Standards and Specifications
| Category | Chinese Standard | International Standard |
|---|---|---|
| Design Standard | GB/T12238 | API 6D, API 594 |
| Pressure-Temperature Rating | GB/T150 | ASME B16.34 |
| Face-to-Face Dimensions | Factory Standard | API 6D, API 594 |
| Flange Dimension Standard | GB/T 9113, GB/T9124 | ASME B16.5, ASME B16.47 |
| Inspection & Testing | JB/T 9092, GB/T 13927 | API 598, API 6D |
Main Connection Dimensions – H76 Dual Plate Check Valve (PN1.0 / 1.6 / 2.5 MPa)
Unit: mm
| DN | L | D | D3 | D2 |
|---|---|---|---|---|
| 50 | 60 | 108 | 56 | 51 |
| 65 | 67 | 128 | 73 | 65 |
| 80 | 73 | 142 | 88 | 80 |
| 100 | 73 | 162 | 108 | 102 |
| 125 | 86 | 192 | 132 | 127 |
| 150 | 98 | 218 | 160 | 152 |
| 200 | 127 | 273 | 210 | 203 |
| 250 | 146 | 328 | 266 | 254 |
| 300 | 181 | 378 | 310 | 305 |
| 350 | 184 | 438 | 355 | 350 |
| 400 | 191 | 489 | 405 | 400 |
| 450 | 203 | 539 | 455 | 450 |
| 500 | 219 | 594 | 505 | 500 |
| 600 | 222 | 696 | 605 | 600 |
| 700 | 305 | 811 | 700 | 695 |
| 800 | 305 | 918 | 800 | 796 |
| 900 | 368 | 1018 | 903 | 898 |
| 1000 | 432 | 1124 | 1055 | 1050 |
| 1200 | 524 | 1340 | 1205 | 1200 |
Main Connection Dimensions – H74 Wafer Type Swing Check Valve (PN10 / PN16 / PN25)
Unit: mm
| DN | B | A (PN10) | A (PN16) | A (PN25) | L |
|---|---|---|---|---|---|
| 40 | 23 | 93 | 93 | 93 | 16 |
| 50 | 33 | 108 | 108 | 108 | 16 |
| 65 | 41 | 128 | 128 | 128 | 16 |
| 80 | 54 | 144 | 144 | 144 | 16 |
| 100 | 71 | 164 | 171 | 170 | 16 |
| 125 | 92 | 193 | 196 | 196 | 16 |
| 150 | 112 | 220 | 228 | 228 | 19 |
| 200 | 155 | 275 | 288 | 291 | 28 |
| 250 | 201 | 330 | 343 | 354 | 32 |
| 300 | 240 | 380 | 403 | 420 | 38 |
| 350 | 270 | 440 | 460 | 477 | 38 |
| 400 | 311 | 493 | 517 | 549 | 48 |
| 450 | 360 | 543 | 567 | 574 | 48 |
| 500 | 410 | 598 | 627 | 630 | 58 |
| 600 | 490 | 697 | 733 | – | 68 |
FAQ
What are the main differences between H76 and H71 check valves?
H76 is a dual plate (double-door) check valve, while H71 is a single plate design for lighter duty.
Is the H76/H71 check valve compatible with ASME and API standards?
Yes, it meets API 6D, API 594, ASME B16.5, and B16.47 specifications.
What materials are used in the H76/H71 check valves?
These valves are made of corrosion-resistant stainless steel, suitable for aggressive industrial environments.
Can this valve be used in both horizontal and vertical pipelines?
Yes, the wafer design supports both orientations, making it highly flexible.
What sizes are available for the H76/H71 check valves?
Available in DN sizes from 50 mm up to 1200 mm to suit a wide range of pipeline systems.
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