Wenzhou Goldtop Valve Co.LTD
Wenzhou Goldtop Valve Co.LTD

Gold top valve  located in Oubei Town, Wenzhou, China,where can make all kinds of precision balls,including top entry,metal seat and V type balls.On this base,our products range of floating,trunnion,Gate globe check valve ,butterfly valve ,etc.Surely we can design them by customer's special requirements.

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API6D 8 Inch Ball Valve Double Block And Bleed TA LUFT Cryogenic Service Design

API6D 8 Inch Ball Valve Double Block And Bleed TA LUFT Cryogenic Service Design

  • API6D 8 Inch Ball Valve Double Block And Bleed TA LUFT Cryogenic Service Design
  • API6D 8 Inch Ball Valve Double Block And Bleed TA LUFT Cryogenic Service Design
API6D 8 Inch Ball Valve Double Block And Bleed TA LUFT Cryogenic Service Design
Product Details:
Place of Origin: 中国
Brand Name: GOLD TOP
Certification: API6D
Payment & Shipping Terms:
Minimum Order Quantity: 1pcs
Price: Negotiation
Packaging Details: Plywood Case
Delivery Time: 30days
Supply Ability: 100+pcs+30 days
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Detailed Product Description
Construction: Cryogenic Ball Valve Standard: API6D
Fire Safe: API 607 Materials: F51
Face To Face: ASME B 16.10 Operator: GEAR OPERATE
High Light:

full flow ball valve


fb ball valve

full bore ball valve trunnion mounted Double block and bleed TA LUFT & ISO 15848 Cryogenic service design


Features on Demand

  • Double piston effect design (DIB-1 type and DIB-2 type)
  • Live-loaded stem packing feature;
  • Lip seal design
  • Cryogenic service design ( -196 °C ​ or -320 °F)
  • Extended stem design for buried service

Standard Features

  • Double block and bleed
  • Spring loaded floating seat design
  • Cavity pressure self-relieving
  • Multiple seal for protection against external leakage
  • Stem separated from the ball and anti-blowout design
  • Triple seals for protection against stem leakage / Meet TA LUFT & ISO 15848
  • Stainless steel trim parts for 4” and smaller / ENP plating for trim parts for 6” and up
  • Antistatic device
  • Emergency stem and seats sealant injection fitting
  • Fire safe to API 607 & API 6FA
  • NACE compliance and fully comply with MR-0175

turnnion mounted ball valve is widely used in oil, nature gas pipeline and the industries of

liquid gas, coal gas, etc. as an open/close control element.


The design of seat seal uses unique two-level soft seal and metal to metal seal to form triple sealing to

ensure seal reliability with small open/close torque and easy operation. So it is safe and free of maintenance

to use this series of ball valve. This type of valves has advantage of less weighted and cost effective.

It is ideal for frequent on-off flow control in big size and high pressure pipeline.




Size: 10''

Pressure: 2500LB


Body:WCB casting /Ball: A105+ ENP

Operation: handwheel

Construction:3 pc type


The Series 21/18 offers unsurpassed reliability with a body machined from solid wrought materials, providing maximum strength and virtually eliminating porosity. Materials include Stainless Steel, Monel, Titanium and others as required.

The 21/18 utilizes a split body design. The body seal is totally encapsulated to prevent cold flow. Positive cavity venting into the upstream piping is accomplished by a relief hole in the ball. The 21/18 is available in ASME 150-900 pressure ratings and low torque operation down to -452°F (-269°C), a result of our exclusively designed Cryofil seats. The leak-proof integrity of the valve is further enhanced by a welded bonnet design and Chevron V-ring packing, which can be adjusted by a simple turn of the stem nut.







Trunnion ball valves have the obturator bounded by trunnions which do not allow axial displacements of the ball itself in the flow direction; line pressure compresses the seat onto the ball, the contact between surfaces generates the valve sealing; trunnion standard construction ensure automatic cavity relief in case of overpressure in body cavity; these valves can be selected for a wide range of applications with no specific limits to sizes and pressures.



  • Stainless steel
  • Nickel alloys
  • Titanium







Construction Two or Three piece bolted body
Port Reduced bore, full bore or fully piggable
Stem retention Anti-blow-out stem
Leakage rate ISO 5208 rate A soft seated, rate D metal seated, BS6364
Antistatic device Included, the ball valve design includes an electric conductive connection between the internal parts of the ball valve and the body, providing the anti-static function.
Pressure relief Automatic cavity relief to prevent overpressure in body cavity (self-relieving seats)
Sealing Bi-directional, Double block & bleed (DBB) with sealing in both directions (DIB-1&2 upon request)
Metal seated with Tungsten or Chrome Carbide coatings Soft seated with thermoplastic polymers (PEEK, PCTFE), special polymers upon request
PTFE Lip seals (Elgiloy)
Drain Drilled and threaded connections for all sizes
Vent Drilled and threaded vent connections for sizes ≥ DN150 (6") < DN150 upon request
Stem grease injectors Not foreseen for this model, upon request only
Seat grease injectors Not foreseen for this model, upon request only
Lifting points Included for sizes ≥ DN150 (6") or on valves of 250 kg min
Support feet Included for sizes ≥ DN150 (6") or on valves of 250 kg min
Stem extension Suitable length to allow operation at service conditions
Valve operation Lever, Gear box or Actuator with position indicator and locking device
Material testing Pressure containing & controlling parts to EN 10204 3.1
Materials in Sour Service according to NACE MR0175, MR0103, ISO 15156
Non-destructive testing (NDT) to API 6D, ASME B16.34
Valve testing Hydrostatic & pneumatic testing to API 6D, ASME B16.34,
ISO 5208 (other upon request)





Design API 6D, API 6DSS, API 6A, ASME B16.34, ISO 14313, ISO 10423, ISO 17292
Design pressure ASME B16.34, EN 1092-1, ISO 17292
Body wall thickness ASME B16.34, ASME VIII Div. I, ISO 17292
Face to Face API 6D, ASME B16.10 Long pattern
Temperature range -51° to -196°C (-59,8° to -320,8°F)
Pressures range PN20 (ANSI 150) to PN420 (ANSI 2500)
Size range DN15 (1/2") to DN1400 (56")
End connections ASME B16.5 ≤ DN600 (24") Flanged RF,FF,RTJ
MSS-SP-44 = DN550 (22") Flanged RF,FF,RTJ
ASME B16.47 A ≥ DN650 (26") Flanged RF,FF,RTJ
ASME B16.25 Butt-Weld BW
Clump (HUB)



Safety Integrity Level SIL 3
Fire Safe API 607, API 6FA, BS 6755, ISO 10497-5
Area Classification ATEX 94/9/EC
Pressure Equipment Directive PED 97/23/EC
Fugitive Emission ISO 15848/1
Construction API 6D, API 6DSS

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Contact Details
Wenzhou Goldtop Valve Co.LTD

Contact Person: sales

Tel: +8613758447235

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