Emergency Shutdown Double Block&bleed Ball Valve
PMV Emergency Shutdown Double Block&bleed Ball Valve is equipped with Electric or Pneumatic actuator, which can achieve automatically operation for DBB ball valve and can shut down under emergency condition. DBB ball valve with actuator is widely used for high pressure and high temperature working condition. With the double block and bleed function, the DBB ball valve can keep operation when one closure element is temporarily ineffective.At same time, the emergency shutdown function can sure the safe of oil or natural gas pipe.
VALVE DESIGN
API 6D, API 6A, ASME B16.34, ISO 14313, ISO 10423, ISO 17292
TEMPERATURE RANGE
-58 to 392°F (-50 to 200°C)
SIZE
NPS 1-12 (DN 25-300)
PRESSURE RATING
ASME 150 - ASME 2500
FACE-TO-FACE
As per API 6D standard
END CONNECTIONS
RF, RTJ as per B16.5 &B16.47
BW, Butt Welded as per B16.25
SW, Socket Welded as per B16.11
MATERIALS
Low Temperature and Low Alloy Carbon Steel
Stainless steel, Duplex and Super Duplex
Nickel alloys, Titanium
BODY DESIGN
Forged and casting bolted two-piece and three-piece
SEAT DESIGN
Soft or metal seated with Hard facing on ball and seats
Double piston seats
Combination seats
FEATURES
Double block and bleed design (DBB)
Secondary seals in pure Graphite
Anti-Static Device
Anti Blow out stem
Emergency sealant injection on seats and stem available
Low fugitive emission stem packing available
O-ring /Lip seals and Graphite configuration
CRA overlay on all dynamic sealing areas or on all wetted parts available
Extended bonnet for low & high temperature available
OPERATOR
Manual: wrench or Gear with padlocking
Actuated: Pneumatic/Electric
TESTING & CERTIFICATIONS
Compliance with API 6D & ISO 5208 & API 598 inspection and testing
Fire safe and fire tested as per API 607
SIL 3 Certification as per IEC61508
Fugitive Emission as per ISO15848
PED 2014/68/UE
FAQ
Q: What is the function of the actuator?
A: The ball valve with actuator can achieve quickly cutoff, of which is very suitable for extremely working condition( high temperature and high pressure).
Q: How to get the price of actuator?
A: Firstly, we need you provide detailed specification of electric actuator or pnematical actuator which is very important for us to provide an accurate price for you. If you will purchase the actuator by yourself, we will privide detailed Torque value and ISO pad for you to select suitable actuator.
Q: How to select materials of seat insert?
A: In common condition, we will quote as your material requirements. If the seat insert our clients select is not suitable for your working condition(medium, temperature, pressure), we help you to change the suitable one for you. The working medium will directly touch with seat insert and working temperature and pressure will impact the sealing performance of seat insert, so our technical team will choose the most fittable material of seat insert for you based on it working condition. Below 150#, PTFE. 150# to 600# RPTFE. 600# to 900# Delvon. 900# to 1500# Devlon or Nylon. 2500# PEEK.
Q: What is API 6D?
A: API 6D is an international standard formulated by the American Petroleum Institute (API) specifically for valves used in pipeline systems of the oil and gas industry. The standard indicate the comprehensive requirements in the aspects of design, production, inspection, test, which provide the important reference for guarantee of quality and safety of valves.
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