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Pneumatic PPH Flange Diaphragm Valve
Pneumatic PPH Flange Diaphragm Valve
The Pneumatic PPH Flanged Diaphragm Valve is an essential component for industrial automation, specializing in the flow regulation of the most challenging fluids. It features a body constructed from corrosion-resistant PPH (Polypropylene Homopolymer) and a similarly resistant elastic diaphragm, ensuring longevity and reliability in harsh chemical service.
Description
The pneumatic diaphragm valve utilizes the elastic diaphragm as the primary throttling element. Critically, it operates without a traditional stuffing box/gland packing structure, which eliminates a common failure point and guarantees zero external leakage, making it exceptionally safe for hazardous applications.
Product Features
Superior Flow Dynamics: The valve body is designed with a smooth, streamlined flow channel, which dramatically reduces fluid resistance and ensures both high flow capacity and efficient media transfer.
Zero External Leakage: By eliminating the conventional gland packing, the valve provides a definitive, maintenance-free seal, preventing the escape of toxic or corrosive media.
Enhanced Safety Profile: Inherently built with fireproof and explosion-proof advantages, adding a necessary layer of safety when handling volatile substances.
Robust Materiality: Built with a corrosion-resistant PPH body that is chemically impervious to strong acids and alkalis.
Material Table
| NO. | Component | Material |
| 1 | Body | PPH |
| 2 | Bonnet | PPH |
| 3 | Diaphragm | EPDM+F46 |
| 4 | Disc | UPVC |
| 5 | Cylinder | Aluminum alloy |
| 6 | Piston | Aluminum alloy |
| 7 | Stem | Stainless steel 304 / 45# |
| 8 | Way of connection | Flange |

| DN | L | D | D1 (HG) | D1 (JIS) | D1 (DIN) | D1 (ANSI) | n | ϕd | A | H | Valve Weight (KG) |
| 15 | 125 | 95 | 65 | 70 | 65 | 60 | 4 | 14 | 110 | 215 | 2 |
| 20 | 135 | 105 | 75 | 75 | 75 | 70 | 4 | 14 | 110 | 220 | 2.3 |
| 25 | 145 | 115 | 85 | 90 | 85 | 80 | 4 | 14 | 110 | 225 | 2.5 |
| 32 | 150 | 135 | 100 | – | – | – | 4 | 18 | 140 | 240 | 3 |
| 40 | 180 | 145 | 110 | 105 | 110 | 100 | 4 | 18 | 170 | 285 | 5 |
| 50 | 210 | 160 | 125 | 120 | 125 | 120 | 4 | 18 | 170 | 307 | 8 |
| 65 | 250 | 180 | 145 | 140 | 145 | 140 | 4 | 18 | 200 | 327 | 13 |
| 80 | 300 | 195 | 160 | 150 | 160 | 152 | 8 | 18 | 230 | 390 | 16 |
| 100 | 350 | 215 | 180 | 175 | 180 | 190 | 8 | 18 | 260 | 470 | 24 |
| 125 | 400 | 245 | 210 | 210 | 210 | 216 | 8 | 18 | 310 | 637 | 30 |
| 150 | 480 | 280 | 240 | 240 | 240 | 240 | 8 | 23 | 370 | – | – |
| 200 | 570 | 335 | 295 | 290 | 295 | 298 | 8 | 23 | 490 | – | – |
Application Areas
Due to its unique design and robust materials, this valve is widely deployed for demanding flow regulation across numerous industrial sectors:
Extreme Chemical Service: Controlling strong acids, strong alkalis, and highly corrosive media in chemical plants.
Difficult Media Handling: Successfully regulates fluids that are high-viscosity, or those that contain particles, granules, or fibers, which can damage traditional valve seats.
Critical Safety & Purity: Used for managing toxic fluids and in processes where the media is not permitted to be contaminated by external valve components.





















