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Branch Office: Mehta House, Relief Road, Ahmedabad 380001
Tel: +91 97732 78770 | Email: info@supremevalves.in | www.supremevalves.in
Technical Datasheet -- Boiler Blow-Down and High-Pressure Drain Valve
Parallel slide blow down valves for boiler blow-down and high-pressure drain service. The parallel slide disc design eliminates the seat scoring common in wedge gate valves during throttling and particle-laden blow-down cycles. Spring-loaded SS316/Stellite disc plates ensure tight shutoff across the full temperature range, even after repeated thermal cycling.
| Parameter | Specification |
|---|---|
| Product Type | Parallel Slide Blow Down Valve |
| Category | Specialty Valves |
| Size Range | 2" to 12" (DN50 to DN300) -- other sizes on request |
| Pressure Rating | PN16 (other ratings on request: PN25, PN40, Class 150, Class 300) |
| End Connections | Flanged EN 1092-1 (PN16) or ASME B16.5 Class 150 RF |
| Body Material | ASTM A216 WCB Carbon Steel Casting |
| Disc / Seat Plates | SS316 Stainless Steel with Stellite overlay on seating surface |
| Stem Material | ASTM A276 316 Stainless Steel with anti-blowout design |
| Packing | Graphite braided packing with live-loading -- fire-safe and steam-compatible |
| Gasket | Spiral wound SS316/graphite per ASME B16.20 |
| Bonnet Type | Bolted bonnet with extended neck for high-temperature insulation |
| Operation | Handwheel (standard) -- gear operator or electric actuator for large sizes |
| Temperature Range | Up to +425 deg C (WCB body) -- up to +540 deg C with WC6 body |
| Component | Material |
|---|---|
| Carbon Steel | ASTM A216 WCB, A105 |
| Stainless Steel | SS316 disc and seat plates, A276 316 stem |
| Overlay | Stellite 6 on seating surface for erosion resistance |
| Packing | Graphite braided with live-loading (steam-compatible) |
| Test | Requirement |
|---|---|
| Testing | Hydrostatic shell test 1.5 x WP per EN 12266-1 / API 598; Seat leakage test per EN 12266-1 / API 598; Functional test -- full stroke, tight shutoff after repeated blow-down cycles |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
| Standard | Description |
|---|---|
| Design Standard | BS 1873 / DIN 3356 Globe Valve pattern adapted for parallel slide blow-down service |
The Parallel Slide Blow Down Valve -- PN16 WCB/CS 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.