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Compact Monoblock Double Block and Bleed Valve for Instrument and Critical Isolation
This datasheet covers monoblock double block and bleed ball valves in SS316 with two balls and integral needle bleed for instrument take-off, gauge root, and critical process isolation.
| Parameter | Specification |
|---|---|
| Valve Size Range | DN8 to DN100 (1/4" to 4") |
| Pressure Rating | PN100 / Class 600 / Class 900 / Class 1500 |
| Body Material | CF8M (SS316) forged monoblock barstock body, no porosity |
| Ball Material | SS316 solid balls, mirror polished, vent hole drilled |
| Seat Material | PTFE or PEEK cryogenic/high-temperature seats, anti-extrusion design |
| Needle Valve | SS316 integral needle bleed valve with non-rotating tip |
| Stem Material | SS316 anti-blow-out stem with double O-ring and graphite seals |
| Packing | PTFE/graphite V-ring packing with live-loading gland |
| Gaskets | PFA envelope or spiral-wound SS316 + graphite flange gaskets |
| Temperature Range | -46°C to +250°C (PTFE seats); +425°C with PEEK |
| End Connections | Flanged ASME B16.5, threaded NPT, socket weld, butt weld, hub ends |
| Features | True DBB in one body, integral needle bleed, compact monoblock, fire-safe, anti-static |
| Component | Material |
|---|---|
| Body | CF8M (SS316) forged monoblock barstock body, machined from solid, 100% volumetric NDE by ultrasonic |
| Balls | SS316 solid balls, mirror polished, vent hole drilled to prevent pressure trapping in body cavity |
| Seats | Virgin PTFE or PEEK floating seats with anti-extrusion lip and metal seat backup for fire-safe operation |
| Needle Valve | SS316 forged needle valve with non-rotating hardened tip and integral lapped seat |
| Stem | SS316 anti-blow-out stem with double O-ring seals, PTFE/graphite V-ring packing, and anti-static spring |
| Packing | PTFE/graphite V-ring packing with Belleville spring live-loading for constant compression |
| Gaskets | PFA envelope gaskets for chemical service; spiral-wound SS316 + graphite for high-pressure flanged joints |
| Test | Requirement |
|---|---|
| Test Standard | API 598 / API 6D / ISO 5208 |
| Certification | CE, PED, ISO 9001, API 607 fire-safe, API 6D Compliant on request |
| Standard | Description |
|---|---|
| Design Standard | API 6D / API 608 / ASME B16.34 |
The Double Block and Bleed Ball Valve -- Monoblock SS316 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.