Double Block and Bleed (DBB) Needle Valve, Three Handle, 1/2 in NPT, 10,000 psi, Sour Service
Three-handle DBB needle valve, 1/2 in NPT, 10,000 psi sour-service, 316SS body. Positive isolation + bleed for instrumentation tap-offs.
Key features
- Valve Type: Instrumentation
- Nominal Size: 1/2 in
- Working Pressure: 10000 psi
- End Connection (Inlet): 1/2 in NPT Female (process)
- Service Class: Sour (NACE MR0175)
- Valve Type
- Instrumentation
- Nominal Size
- 1/2 in
- Working Pressure
- 10000 psi
- Pressure Class
- 10K
- End Connection (Inlet)
- 1/2 in NPT Female (process)
- Service Class
- Sour (NACE MR0175)
Product description
The Double Block and Bleed (DBB) Needle Valve, Three Handle, 1/2 in NPT, 10,000 psi, Sour Service is a small-bore instrumentation valve, 1/2 in, 1/2 in NPT Female (process), rated for 10,000 psi. NACE MR0175 / ISO 15156 sour-service compliant.
Double-Block-and-Bleed (DBB) design integrates two block valves and a bleed valve in a single body. Allows positive isolation and bleed-down of the instrumentation line without depressurising the process. Standard configuration for pressure transmitter and gauge installations on safety-critical service.
Construction
- Type: Instrumentation — DBB Needle Valve
- Nominal size: 1/2 in
- Body material: 316 stainless steel — NACE MR0175 compliant
- Stem / trim: 316SS stem + 17-4PH spindle
- Seal / packing: Graphite + Inconel braided packing (sour)
- Inlet: 1/2 in NPT Female (process)
- Outlet: 1/2 in NPT Female (instrument)
Performance
Working pressure 10,000 psi. Hydrotested at 1.5× working pressure. Operating temperature -50°F to +250°F (-46°C to +121°C) per the data plate. NACE MR0175 sour-service compliant — material class EE.
Applications
- Pressure-transmitter installation
- Gauge / instrument calibration tap
- Isolation + bleed for safety-critical
- Sour-gas DBB instrumentation
Compliance
- API 6A / ASME B16.34 instrumentation valve criteria
- NACE MR0175 / ISO 15156 (sour-service)
- Mill test reports per EN 10204 3.1 / 3.2
How to order
Confirm (a) line working pressure and pressure class, (b) end connections (NPT / integral flanged / autoclave compression), (c) service class (standard vs sour, with H₂S partial pressure data for NACE compliance), (d) handle type (T-bar handle / handwheel / locking lever), (e) any required ATEX / IECEx certifications for hazardous-area mounting. Indus quotes ex-Dubai for stock items and ex-works OEM for build-to-order.
Companion products
Pair with matching process-side isolation valve (typically a needle or DBB) and the downstream pressure transmitter / gauge. Indus also supplies impulse-line tubing (1/2" / 1/4" / 3/8" 316SS), fittings (compression and weld), and matching mounting brackets on request.
Identification
| Parameter | Value |
|---|---|
| Valve Type | Instrumentation |
Dimensions
| Parameter | Value |
|---|---|
| Nominal Size | 1/2 in |
| End Connection (Inlet) | 1/2 in NPT Female (process) |
| End Connection (Outlet) | 1/2 in NPT Female (instrument) |
| Bore Type | Standard |
Performance
| Parameter | Value |
|---|---|
| Working Pressure | 10000 psi |
| Pressure Class | 10K |
| Service Class | Sour (NACE MR0175) |
Compliance
| Parameter | Value |
|---|---|
| API Specification | Other |
| PSL Class | N/A |
| PR Class | N/A |
| Material Class (API 6A) | EE |
Construction
| Parameter | Value |
|---|---|
| Body Material | 316 stainless steel — NACE MR0175 compliant |
| Trim Material | 316SS stem + 17-4PH spindle |
| Seal / Elastomer Material | Graphite + Inconel braided packing (sour) |
Shipping & lead time
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What is the operating principle of this valve?▾
Is this valve suitable for sour-service (H₂S) wells?▾
What temperature range is this valve rated for?▾
What is the lead time?▾
What handle / operation type is supplied?▾
What standards and certifications are supplied?▾
Shipped worldwide from our Dubai warehouse. Transit, routes and documentation for 126 destinations