PRESSURE BALANCED
PLUG VALVES
API 6D
Plug Valves
type PD
Stem
Stem Seals
Stem Sealant Injection
Plug Sealant Injection
Plug
Bonnet
Plug Valve
type PD
TECHNICAL DESCRIPTION
Description:
Breda Pressure Balanced Plug Valves are designed for a long service life.
Plug and body have tapered surfaces lapped for precise seat mating.
Plug pressure is balanced by two holes connecting the plug port to the lower
and upper chamber avoiding the possibility of plug locking.
The plug and stem are separated pieces to allow the plug to float by pressure
effect.
Pressure Balanced Plug Valves are ON/OFF service valves, reduced bore,
Bi-Directional.
An efficient lubrication system allows a perfect grease distribution preventing
corrosion, optimizing the sealing and providing a smooth operation.
Design Code:
According to API 6D specification.
Standard features:
Emergency Sealant Grease injection on stem
Emergency Sealant Grease injection on Plug
Fire safe design according to API 6FA – API 607 – BS 6755 Part.2
Triple stem seals
Antistatic device
Anti-blowout stem
Option features:
Stem extension for buried installation design.
Remarks:
On request, Breda Energia will issue various technical solutions not listed in
this catalogue. Years of experience in products for distribution of oil & gas
allow Breda Energia to supply products on special client specifications.
- API 6D -
Product Range
Service Pressure Range API 6D
ANSI 150 ANSI 300 ANSI 600 ANSI 900 ANSI 1500 ANSI 2500
Standard Range ( Inch ) (19 bar) (50 bar) (99 bar) (149 bar) (248 bar) (414 bar)
2 up to 30 2 up to 30 2 up to 24 2 up to 12
Material requirements
Trim
Service Body and Material selection
Materials
Conditions Closure Materials general list
Stem-Ball-Seat
General
& Carbon Steel Carbon Steel
Sour Service - Carbon Steel
- Low temperature Carbon Steel
General - Low Alloy Steel
& Carbon Steel Stainless Steel - Martensitic Stainless Steel
Sour Service - Austenitic Stainless Steel
- Duplex Stainless Steel
General - Nickel Alloys
& Stainless Steel Stainless Steel
Sour Service
Materials selection will be performed in accordance with Client data sheet / Specification
Temperature ratings
Operating Range
Temperature °C
Classification from min. up to Max.
min. Max.
Standard -29 121
Low temperature -46 121
Cryogenic -196 121
High Temperature -29 350
Part List & Spare Parts
Recommended
Part N° Description
Spare Parts
01 Body n.a.
02 Bonnet n.a.
03 Plug n.a.
04 Stem n.a.
05 Gland plate n.a.
06 Stem Gaskets Yes
07 Oldham coupling n.a.
08 Plug adjustment screw n.a.
09 Body Studs n.a.
10 Body Stud Nuts n.a.
