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Self-Acting Surge Anticipating Valve for Pump Water Hammer Protection
This datasheet covers pilot-operated surge anticipating valves in cast iron for protecting water pipelines from water hammer caused by pump start-up and shut-down.
| Parameter | Specification |
|---|---|
| Size Range | DN50 to DN400 (2" to 16") |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Body Material | Cast iron GG25 or ductile iron GGG50, epoxy coated |
| Trim Material | SS316 plug, seat, and stem |
| Pilot Material | SS316 high-sensitivity diaphragm pilot with EPDM diaphragm |
| Set Pressure | Factory-set to pipeline maximum operating pressure plus 10% margin |
| Temperature Range | 0°C to +80°C (water service) |
| End Connections | Flanged BS EN 1092-1 PN10/16 or ASME B16.5 Class 150 |
| Operation | Self-acting pilot-operated diaphragm; opens on pressure drop anticipation |
| Features | Surge anticipation, slow closing, SS316 trim, EPDM diaphragm, field-adjustable setpoint |
| Response Time | Opens within 0.5 seconds of pilot sensing pressure drop |
| Component | Material |
|---|---|
| Body | GG25 cast iron or GGG50 ductile iron, sand cast, machined seat bore and cover flange, epoxy coated |
| Bonnet / Cover | GG25 or GGG50 bolted cover with pilot mounting boss and spring chamber |
| Plug | SS316 streamlined plug with EPDM resilient seat insert |
| Seat | SS316 replaceable seat ring, retained by snap ring |
| Stem | SS316 guided stem with upper and lower bearings |
| Diaphragm | EPDM fabric-reinforced rolling diaphragm for main valve; EPDM pilot diaphragm |
| Pilot Assembly | SS316 high-sensitivity pilot with adjustable spring, needle valve for closing speed, and strainer |
| Spring | Music wire compression spring, factory-set, field-adjustable within range |
| Gaskets | EPDM rubber gaskets for body/cover and diaphragm retention |
| Test | Requirement |
|---|---|
| Test Standard | Hydrostatic shell and seat test per BS EN 12266-1; surge response witness test |
| Certification | CE, ISO 9001, WRAS on request |
| Standard | Description |
|---|---|
| Design Standard | BS EN 1074-5 / AWWA C508 |
The Surge Anticipating Valve -- Diaphragm Pilot Cast Iron is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is carbon steel, stainless steel (CF8 / CF8M), and special alloy grades. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.