Double Block & Bleed Valves: Instrument DBB, Needle & ball type. Get quotes from verified suppliers on MetalMitra.
- Double Block & Bleed Valves
- Instrumentation Valves
- Instrument DBB
- Needle & ball type
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Specifications
| Material | A105, SS 316, Duplex, Super Duplex |
|---|---|
| Size | 1/2" to 2" |
| Class | 150 to 2500 |
| Type | Needle-ball-needle, ball-needle-ball |
| Ends | Flanged, NPT |
| Standard | API 6D (where applicable) |
Grades & standards
- Stainless Steel 316
- Super Duplex 2507
Chemical composition & mechanical properties
| C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|
| 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.24–0.32 | 0.50 |
| Tensile strength, min | 795 MPa |
|---|---|
| Yield strength (0.2%), min | 550 MPa |
| Elongation in 50 mm, min | 15% |
| Hardness, max | 310 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
Source Double Block & Bleed Valves from verified manufacturers, mills and stockists on MetalMitra. Compact double block and bleed valves for safe isolation of instruments from process lines in a single body.
Share your size, grade, quantity and delivery location once, and compare offers from suppliers who stock or manufacture Double Block & Bleed Valves to API 6D (where applicable).
What you can source
- 2-Valve Manifolds — For gauge and static pressure transmitters.
- 3-Valve Manifolds — For differential pressure transmitters.
- 5-Valve Manifolds — For DP transmitters with test and vent ports.
- Double Block & Bleed — DBB valves for isolation and venting.
Key properties
- Compact Integration — Multiple valves in one forged body.
- Leak-Tight Design — Fewer joints mean fewer leak paths.
- High Pressure — Rated up to 6,000 psi and above.
- Easy Calibration — Isolate, equalise and vent from one block.
Applications & industries
- Pressure Transmitters
- Differential Pressure Measurement
- Flow Metering
- Sampling Systems
- Oil & Gas
- Refineries
Testing & documentation
Inspection and documentation for Double Block & Bleed Valves follow API 6D (where applicable) plus any extra requirements in your PO.
- Hydrostatic shell test
- Seat leak test
- Helium leak test on request
- Dimensional inspection
- Material Test Certificate
Why source on MetalMitra
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, test certificates and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Request pricing
Post an RFQ for Double Block & Bleed Valves with your drawing or specification and receive quotes from verified suppliers.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the test certificate.
Applications & industries
- Pressure Transmitters
- Differential Pressure Measurement
- Flow Metering
- Sampling Systems
- Oil & Gas
- Refineries
- Oil & Gas
- Petrochemical & Refining
- Power Generation
- Chemical Processing
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
FAQs
A 3-valve or 5-valve manifold, depending on whether you need separate vent or test ports.
A valve assembly with two isolation valves and a bleed between them for safe isolation.
Yes, flange-to-flange and remote-mount versions are available.
Need Double Block & Bleed Valves?
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