DD1V4NU-16DR-HLK-K-V91A Double Block & Bleed Valve by Alco Valves
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The DD1V4NU-16DR-HLK-K-V91A is a single-piece body double block and bleed valve featuring a ball-needle-ball valve configuration with a floating ball design. It is engineered with a 2" Class 900# RF inlet and outlet, alongside a 1/2" NPT female plugged vent and drain conforming to ASME B1.20.1. The valve includes a 10mm (3/8") bore size, an ASTM F51 duplex body material, and ASTM A479 31803 trim materials. For enhanced reliability and safety, it features PEEK, graphite, and Endura V91A seats, seals, and O-rings, plus an X750 anti-static device. Operation is handled via a lockable stainless steel lever and T-bar. Designed to meet NACE MR 01-75 latest revision standards, it operates across a temperature range of -46 ºC to 200 ºC at Class 900 max pressure. Hydrostatic testing is performed in accordance with API 598.
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Characteristics
| Manufacturer | Alco Valves |
|---|---|
| Country | |
| Part number | DD1V4NU-16DR-HLK-K-V91A |
| Inner Code | 3902577 |
Technical specification
| Product type | Double Block & Bleed Valve |
|---|---|
| Valve Configuration | Ball, Needle, Ball |
| Body Type | Single Piece Body, Floating Ball |
| Inlet | 2" CLASS 900# RF |
| Outlet | 2" CLASS 900# RF |
| Vent/Drain | ASME B1.20.1, 1/2" NPT Female - (Plugged) |
| Bore Size | 10mm (3/8") |
| Body Material | ASTM F51 DUPLEX |
| Trim Materials | ASTM A479 31803 |
| Anti-Static Device | X750 |
| Seats/Seals/O-Rings | PEEK/Graphite/Endura V91A |
| Max Pressure | CLASS 900 |
| Max Temperature | 200 ºC |
| Min Temperature | -46 ºC |
| NACE | MR 01-75 LATEST REVISION |
| Operation | STAINLESS STEEL LEVER / T-BAR LOCKABLE |
| Testing | HYDROSTATIC TEST IN ACCORDANCE WITH API 598 |