Diaphragm Valve -- Weir Type Rubber / PTFE Lined
Technical Datasheet -- Flexible Diaphragm Valves for Corrosive and Sterile Service
Document No.SV-DATA-DMV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
Weir-type diaphragm valves for corrosive chemical, pharmaceutical, and water treatment applications. Flexible elastomer or PTFE diaphragm provides bubble-tight shutoff and completely isolates the bonnet, stem, and compressor from the process fluid -- eliminating packing leakage. Compact design with fast-acting operation. Wide diaphragm material selection covers all chemical services. BS EN 13397 / MSS SP-88 compliant. Self-draining weir profile for sterile applications.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Diaphragm Valves |
| Category | Diaphragm Valves |
| Size Range | 1/2" to 16" (DN15 to DN400) |
| Pressure Rating | PN10 / PN16 / Class 150 |
| End Connections | Threaded NPT / BSP, Flanged RF per EN 1092-1 / ASME B16.5, Tri-clamp (sanitary), Socket weld |
| Body Material | ASTM A216 WCB with rubber lining / Ductile Iron GGG50 with rubber lining / ASTM A351 CF8M (SS316) |
| Diaphragm Material | EPDM / NBR / Viton (FPM) / PTFE / RPTFE / Butyl / Hypalon / Neoprene |
| Bonnet Material | ASTM A216 WCB / ASTM A351 CF8M (SS316) / Cast Iron GG25 |
| Compressor Material | SS316 or cast iron with ENP coating |
| Face-to-Face | EN 558 / ISO 5752 short pattern (compact design) |
| Operation | Handwheel (standard) / Pneumatic actuator (spring-return or double-acting) / Electric actuator / Chainwheel |
| Leakage Class | EN 12266-1 Class A -- zero visible leakage (soft diaphragm); Class B/C (PTFE diaphragm) |
| Temperature Range | -20 deg C to +120 deg C (EPDM) -- up to +200 deg C (Viton FPM) -- up to +260 deg C (PTFE diaphragm with SS316 body) |
Materials of Construction
| Component | Material |
|---|
| Carbon Steel | ASTM A216 WCB body with rubber lining (standard industrial) |
| Ductile Iron | EN-GJS-500-7 (GGG50) body with rubber lining (economical water / chemical service) |
| Stainless Steel | ASTM A351 CF8M (SS316) body (corrosive / hygienic / high-temp service) |
| Diaphragm Options | EPDM (water / steam), NBR (oil), Viton FPM (chemical / high temp), PTFE/RPTFE (aggressive chemical / high temp) |
Testing & Inspection
| Test | Requirement |
|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | BS EN 13397 Industrial Valves -- Diaphragm Valves, MSS SP-88 Diaphragm Valves |
Notes
- Diaphragm material must be specified by the purchaser based on chemical compatibility and temperature.
- For high-temperature service (> 200 deg C), PTFE or RPTFE diaphragm with SS316 body is required; rubber diaphragms are not suitable.
- For sanitary / food-grade service, tri-clamp ends and FDA-approved EPDM or PTFE diaphragm are required.
- Diaphragm is a wearable part; recommended spare diaphragm inventory is 1 per 10 valves for critical service.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
