4th Floor, Survey No. 235/A and 247/A, E/401, Nr. Bhattha School, Gyaspur, Ahmedabad 382405, Gujarat, India
Branch Office: Mehta House, Relief Road, Ahmedabad 380001
Tel: +91 97732 78770 | Email: info@supremevalves.in | www.supremevalves.in
Technical Datasheet -- Integral DBB Monoflange Valves for Instrument Isolation
Instrument double block and bleed (DBB) monoflange valves for primary isolation, secondary isolation, and vent/drain of pressure transmitters, gauges, and sampling systems. Integral two ball valves and one needle valve machined from a single SS316 or duplex stainless steel barstock forging. Compact design replaces three separate valves, eliminating leak paths and reducing weight by 70%. NACE MR0175 sour service standard. Multiple configurations: 2-ball+1-needle (standard DBB), 1-ball+1-needle (SBB), 2-ball+2-needle (DBDB), 3-ball+1-needle (manifold). API 6D / ASME B16.34 / NACE MR0175 compliant.
| Parameter | Specification |
|---|---|
| Product Type | Double Block & Bleed Monoflanges |
| Category | Multi-Port Valves |
| Size Range | 1/2" to 2" (DN15 to DN50) -- instrument process connection: 1/2" NPT female typical; instrument outlet: 1/2" NPT female typical |
| Pressure Rating | Up to 6,000 psi (414 bar) -- standard: 4,500 psi (310 bar) |
| Process Connection | Flanged RF / RTJ per ASME B16.5 Class 150 / 300 / 600 / 900 / 1500, Threaded NPT / BSP, Socket weld, Butt weld |
| Instrument Connection | Threaded NPT / BSP / metric (1/2" typical), Flanged RF (small size), Tube fitting compression (1/4" to 1/2" OD) |
| Body Material | ASTM A182 F316 (SS316 forged barstock) / ASTM A105 (carbon steel forged barstock) / ASTM B564 UNS N04400 (Monel) / Duplex SS ASTM A182 F51 / F53 |
| Ball Valve Trim | SS316 ball with ENP or chrome plating, PTFE/RPTFE seats, SS316 stem with anti-blowout |
| Needle Valve Trim | SS316 precision needle with Stellite 6 tip, integral SS316 seat, PTFE/RPTFE or graphite packing |
| Vent / Drain Connection | Threaded NPT / BSP (1/2" or 3/4" typical) with plug or cap -- can be oriented to process or safe direction |
| Configuration | 2-ball + 1-needle (standard DBB) / 1-ball + 1-needle (single block and bleed) / 2-ball + 2-needle (double block and double bleed) / 3-ball + 1-needle (three-valve manifold) |
| Leakage Class | API 598 / EN 12266-1 Class A -- zero visible leakage for ball and needle valves at rated pressure |
| Temperature Range | -50 deg C to +200 deg C (PTFE seats/packing) -- up to +540 deg C (graphite packing, SS316 body) |
| Component | Material |
|---|---|
| Stainless Steel | ASTM A182 F316 (SS316) forged barstock body, ball, needle, and seat (standard instrument service) |
| Carbon Steel | ASTM A105 forged barstock body (standard industrial, non-corrosive) |
| Nickel Alloy | ASTM B564 UNS N04400 (Monel) body and trim (seawater / reducing acid service) |
| Duplex Stainless Steel | ASTM A182 F51 / F53 (duplex SS) body and trim (sour gas / chloride service per NACE MR0175) |
| 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 |
| Standard | Description |
|---|---|
| Design Standard | API 6D (reference for DBB concept), ASME B16.34, NACE MR0175 (standard for sour service), ISO 17292 |
The Double Block & Bleed Monoflange -- Instrument 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.