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DBB PLUG Valve
GZP integrity double block and bleed expanding plug valves for product isolation, blending, metering, custody transfer, fueling operations, terminal, storage and other land or offshore zero leakage applications.
Description
Double Block & Bleed Expanding Plug Valve
GZP integrity double block and bleed expanding plug valves for product isolation, blending, metering, custody transfer, fueling operations, terminal, storage and other land or offshore zero leakage applications.
The main construction features of GZP plug valve are following:
1. The plug valve has simple structure, quick switch, small fluid resistance and fast angular stroke operation.
2. Soft sealing and lubricated hard seal are available.
3. Structure form: lifted type, sleeve connection type, inverted type.
4. Unique design can be antistatic, fire safety, safe to use.
5. The medium can flow in two directions, the installation direction is not limited, can be maintained on the pipeline, more convenient to use.
It replaces antiquated two-valve systems with a single DB&B valve solution. It has two seats (slips) and provides a bubble tight seal.
DBB Valve Construction
Available Sizes and Pressures
ANSI Class | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 | 28 | 30 | 36 |
150 | HW/GO | HW/GO | HW/GO | HW/GO | GO* | GO* | GO* | GO* | GO* | GO* | GO* | G0* | G0* | GO* | GO* |
300 | HW/GO | HW/GO | HW/GO | GO* | GO* | GO* | GO* | GO* | GO* | GO* | GO* | GO* | GO* | GO* | N/A |
600 | HW/GO | HW/GO | GO | GO* | GO* | GO* | GO* | GO* | GO* | GO* | GO* | GO* | GO* | N/A | N/A |
900 | N/A | GO* | GO* | GO* | GO* | N/A | N/A | GO* | GO* | N/A | N/A | N/A | N/A | N/A | N/A |
HW = Available Only as Handwheel Operated * These sizes have lifting lugs
GO = Available Only as Gear Operated
HW/GO = Available as Handwheel or Gear Operated
Standard Materials of Construction (Alternative materials available upon customer request)
DBB plug valves are constructed to meet requirements of NACE MR0175 / ISO 15156
Component | Standard Temp. (-20º to 400º F) (-29º to 204º C) | Low Temp. (-49º to 400º F) (-45º to 204º C) (1) |
Body | Cast ASTM A216 WCC (2) | Cast ASTM A352 LCC (2) |
Bonnet/ Lower Plate | Cast ASTM A216 WCC / Forged ASTM A350 LF6 CL2 | Cast ASTM A352 LCC / Forged ASTM A350 LF6 CL2 |
| Plug and Stem | Cast ASTM A216 WCC (3) | Cast ASTM A352 LCC (3) |
Slips | Cast Ductile Iron / Cast A395 GR 60-40-18 | Cast ASTM A352 LCC |
Packing Gland | Forged ASTM A350 Gr. LF2 | Forged ASTM A350 Gr. LF2 |
Stem Packing | Pre-Formed Flexible Graphite | Pre-Formed Flexible Graphite |
Gasket | Pre-Formed Flexible Graphite | Pre-Formed Flexible Graphite |
O-Rings & Slip Seals | Viton B (4) | Viton GFLT (4) |
Bonnet to Body Studs | ASTM A193 Gr. B7M | ASTM A320 Gr. L7M |
Bonnet Nuts | ASTM A194 Gr. 2HM | ASTM A194 Gr. 2HM |
Relief System Tubing | AISI 316 SS / AISI 304 SS | AISI 316 SS / AISI 304 SS |
Relief System Needle Valve | AISI 316 SS | AISI 316 SS |
| Relief System Check Valve | AISI 316 SS | AISI 316 SS |
Technical data | |
Design | API 6D, API599 |
Pressures range | ANSI 150 ~ANSI 900 ,PN10~PN150 |
Size range | DN50(2") ~DN350 (14") |
Body Material | Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel.etc. |
NACE MR-01-75/NACE MR-01-03 Special Requirements | |
Face to face | API 6D, ASME B 16.10,EN 558,DIN3202 |
Fanged RF, FF, RTJ Ends | ASME B16.5 |
BS 4504,DIN 2543-2545,EN1092 | |
Butt-Weld BW Ends | ASME B16.25 ,DIN 3239,BS 2080, EN 12627 |
Temperature range | -29°~ 350°C |
Design feature | |
Construction | Lifted type,sleeve type,inverted type,jacketed type |
Port | Full bore and Reduced bore |
Plug Type | plug type |
Stem | Blowout-proof stem |
Seat Sealing | metal seat,soft seat,lubricated seal, |
Valve Operation | Gear,pneumatic,Hydraulic,Electric actuators. |
By passes,locking devices,extended stem,etc | |
Fire Safe | API 607, BS 6755,API599 |
Other design | Anti-static design,automatic pressure relief design, emergency grease injection design, drain valve, anti-corrosion design, anti-sulfur design,etc |
Inspection and Test | |
Visual Inspection | MSS SP-55 |
Material Inspection | PMI Test----Chemical Analysis |
HB Test---Hardness Test | |
UT---Ultrasonic Test | |
RT---Radio-graphic Test | |
MT---Magnetic Test | |
NDT Test Non-destructive | |
Dimension inspection | According to drawings |
Valve Inspection and Test | API 598,DIN 3230,EN 12266,BS 5146 |
The range of GZP plug valve design is as follows:
1. Size: 2” to 14”, DN50 to DN350
2. Pressure: Class 150lb to 900lb, PN10-PN350
3. Connection ends: ASME B 16.5 in raised face(RF), Flat face(FF) and Ring Type Joint (RTJ）
ASME B 16.25 in butt welding ends.
4. Face to face dimensions: conform to ASME B 16.10.
5. Temperature: -29℃ to 350 ℃
GZP valves can be manufactured in all kinds of materials to meet different requirements from clients, especially in NACE standard.
GZP valves can be equipped with gear operator, pneumatic actuators, Hydraulic actuators, Electric actuators, bypasses,locking devices,chainwheels,extended stems and many others are available to meet the customers’ requirement.
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