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300LB Double Block & Bleed Ball Valve

Basic Information
Place of Origin: China
Brand Name: Coosai
Certification: API6D,API607
Model Number: Q47F
Minimum Order Quantity: 1PC
Packaging Details: Polywood cases
Delivery Time: 2-15weeks
Payment Terms: L/C,T/T
Supply Ability: 20000 pcs per year
Detail Information
Size: Size: NPS 2" To 60" Pressure: 150LB To 2500LB
Temperature Range: -196℃~300℃ Low Temperatue, Normal Temperature And High Temperature Body And Trim Material: Cast Steel, WCB,ASTM A105, ASTM A350 LF2, ASTM A182 F304 F304L F316/F316L/F51 F53 F55,ASTM A351 CF8 CF8M CF3M ASTM A182 F6a 17-4PH
Seat Material: PTFE, RPTFE, DEVLON, Molon,PEEK,Metal Seat Body And Stem Sealing: Oring(FKM,FFKM NBR,FPM HNBR, VITON,EPDM, AFLAS), Spiral Wound Gasket(316SS+ Graphite) Packing(Graphite, PTFE)
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300LB Double Block & Bleed Ball Valve


BW Ends Double Block & Bleed Ball Valve


300lb dbb ball valve

Product Description

Double Block & Bleed Ball Valve Side Entry 300LB BW Ends




Trunnion Mounted ball valve are suitable for using on various kinds of pipelines of Class 150 to Class 2500, PN16~PN160, JIS 10K~ JIS 20K to cut off or turn on the pipeline medium, of which the operation types include worm gear, manul, pneumactic or electric actuators, being in general of flange connection, and butt welding end connection as well.


Blow-out proof stem:

The stem is made separately from the ball with integral T-type round shoulder, retained by bland .(other designs are Available on request)


Anti-static device:

Spring plus graphite type anti-static device are applied between the ball ,stem, gland Flange and body to keep the electrical Continuity between all the metallic components . And ensure the resistance lower than the most severe service requirement.


Grease injection device

For DN150 (NPS 6) & larger the stem and the valve seat are provided with a sealing grease injection device, For DN125 & smaller, we can provide the sealing grease injection device according to customer requirements. When the O-ring is damaged by accident, by injected sealant sealed to prevent the media through the valve seat ring and stem leaks.

300LB Double Block & Bleed Ball Valve 0


Fire safe design

Coosai ball valves ensures 100% pass of the fire safe test. As Coosai Ball valve applies two sealed design via O-ring seals and metal graphite spiral wound gasket. When the valve is on fire, non-metallic materials such as PTFE seat seals, gaskets ,O-ring seals,rubber etc will be damaged, meanwhile the outer layer of metal graphite spiral wound gasket provides a secondary seal. When the soft seat is burned, metal seat will automatically form a metal seal with ball under the urging of the spring which will effectively control the internal leakage and external leakage. Valve design fully accords with API 607, API 6FA, BS 6755, JB / T 6899 and other standards,

300LB Double Block & Bleed Ball Valve 1



Sealing Options

Soft seat: Metal to Metal O-Ring seal

Simple structure reliable sealing Applicable to particulate Reliable sealing low torque meet customers' high

wide application low cost. media conditions sealing reliability and low torque requirements

300LB Double Block & Bleed Ball Valve 2




When the ball is in the closed position, each seat seals off the process medium independently at the same time between the up/down stream and body cavity, it allows bleeding the trapped cavity pressure (DBB) through drain and vent valve. The double block and bleed function make it possible to flush the valve under pressure and verify that the seat are sealing properly.

300LB Double Block & Bleed Ball Valve 3



Double piston effect seat, medium pressure, both upstream and downstream as well as in the body cavity, creates a resultant thrust that pushes the seat ring against the ball, valve with double piston effect seat rings require a cavity pressure relief to reduce the build-up of over pressure in the body cavity.

300LB Double Block & Bleed Ball Valve 4



Ball Valve Type Design and Manufacture Face to Face/End to End Flange Dimensions Pressure Temperature Rating Inspection and Test
Split Flange ball valve BS5351 ANSI B16.10 ANSI B16.5 ANSI B16.34 API6D
Fixed flange ball valve API6D/API608 API6D ANSI B16.47 ANSI B16.34 API598


Main Material

Body material Trim material Seal material Gasket/Packing


Design Data

Design standard: API 6D,DIN3357-1 , EN12516-1

Face to Face standard: API6D, ASME B16.10, DIN3202

Connecting Standard: ASME B 16.5, ASME B16.47, DIN 2543/4,ASME B 16.25

Test & Inspect Standard: API 6D ,API 598

Working Temperature: -196℃~610℃

Connection type: RF,RTJ,FF,BW.BSPT,NPT

Sour environment:NACE MR0175


Design Feature

1: Full bore or reduced bore
2: Two-piece or Three-piece body structure
3: Double Block & Bleed, Double isolation and bleed(DIB-1&DIB-2)
4: Fire safe design(API 607)
5: Blowout-proof system
6: Anti-static design
7: Self cavity relief
8: Fugitive emission testing(optional)




The ball is fixed by trunnion and stem for size 4” &smaller.      Trunnion plate support for size 6” & larger  

300LB Double Block & Bleed Ball Valve 5





300LB Double Block & Bleed Ball Valve 6


300LB Double Block & Bleed Ball Valve 7

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Contact Details

Phone Number : +8613017861943