Investment Casting & Industrial Valves 
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Model: H71
Wafer Check Valve (Cast Steel Non-Return Valve)
- Nominal Diameter: 1/2"-10"
- Materials: 316, CF8M, 1.4408, WCB, 304, CF8, etc.
- Design & Manufacture: GB/T 12236
- Face-to-Face: GB/T 12221
- Flange End: JB/T79
- Inspection & Testing: JB/T9092
- Surface Treatment: Pickling, Passivation, Polishing (or as per customer request)
- Operating Temperature: ≤ 120°C
- Suitable Media: Water, Steam, Oil, Gas, Acids, Alkalis, etc.
Materials
| Model | Body | Disc | Spring | Holder |
| Carbon Steel | Stainless Steel 304 | Stainless Steel 304 | Stainless Steel 304 | |
| Stainless Steel CF8 | Stainless Steel 304 | Stainless Steel 304 | Stainless Steel 304 | |
| Stainless Steel CF8M | Stainless Steel CF8M | Stainless Steel CF8M | Stainless Steel CF8M | |
| Stainless Steel CF8L | Stainless Steel 316L | Stainless Steel 316L | Stainless Steel 316L |
Performance Parameters
| Model | Min. Opening Pressure | Water, Steam, Gas, Oil | Applicable Temperature |
| 0.05kg/cm² | Water, Oil, Steam | -29℃ to 425℃ | |
| 0.05kg/cm² | Nitric Acid and Other Corrosive Media | -196℃ to 540℃ | |
| 0.05kg/cm² | Acetic Acid and Other Corrosive Media | -196℃ to 540℃ | |
| 0.05kg/cm² | Urea and Other Corrosive Media | -196℃ to 455℃ |
Dimensions (mm)
| Size | PN1.0MPa | PN1.6MPa | PN2.5MPa | PN4.0MPa | |||||||||
| NPS | DN | L | D | L | D | L | D | L | D | ||||
| 1/2" | 15 | 30 | 52 | 30 | 52 | 30 | 52 | 30 | 52 | ||||
| 3/4" | 20 | 30 | 62 | 30 | 62 | 30 | 62 | 30 | 62 | ||||
| 1" | 25 | 30 | 72 | 30 | 72 | 30 | 72 | 30 | 72 | ||||
| 1 1/4" | 32 | 35 | 83 | 35 | 83 | 35 | 83 | 35 | 83 | ||||
| 1 1/2" | 40 | 35 | 93 | 35 | 93 | 35 | 93 | 35 | 93 | ||||
| 2" | 50 | 40 | 108 | 40 | 108 | 40 | 108 | 40 | 108 | ||||
| 2 1/2" | 65 | 50 | 128 | 50 | 128 | 50 | 128 | 50 | 128 | ||||
| 3" | 80 | 60 | 142 | 60 | 142 | 60 | 142 | 60 | 142 | ||||
| 4" | 100 | 75 | 162 | 75 | 162 | 75 | 168 | 75 | 168 | ||||
| 5" | 125 | 90 | 192 | 90 | 192 | 90 | 194 | 90 | 194 | ||||
| 6" | 150 | 105 | 218 | 105 | 218 | 105 | 224 | 105 | 224 | ||||
| 8" | 200 | 112 | 273 | 112 | 273 | 112 | 284 | 112 | 291 | ||||
| 10" | 250 | 140 | 328 | 140 | 329 | 140 | 341 | 140 | 353 | ||||
Investment Casting & Valve Manufacturing Since 1987
At SDPLDL, we are a trusted manufacturer specializing in precision investment casting and industrial valves for global markets. We operate our own manufacturing facility featuring over 200 sets of advanced manufacturing equipment and an in-house testing center equipped with 16-ton dynamic balancing machines. Our integrated manufacturing capabilities allow us to seamlessly produce precision investment casting valves, custom stainless steel large-diameter valves, and slurry valves under strict compliance with ISO 9001 standards.
