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Full Welded Body 1 Pieces Ball Valve Steel 20 Soft Seat For Gas

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Full Welded Body 1 Pieces Ball Valve Steel 20 Soft Seat For Gas

Brand Name : TEKO

Model Number : QA61F

Certification : CE Certificate

Place of Origin : China

MOQ : 1 pcs

Price : By Negotiation

Payment Terms : L/C

Supply Ability : 100 tons per month

Delivery Time : 35 days after deposit

Packaging Details : By wooden cases

Material : WCB, Forged Steel

End : BW End

Pressure rating : High Pressure

Operation : Manual, Electric

Body : All Welded

Extened Stem : Available

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Steel 20 High Pressure Soft Seat Full Welded Body 1 Pieces Ball Valve For Gas


SpecificationDetails
Design StandardAPI 6D, BS 5351
Pressure/Temperature ChartASME B16.34, BS 5351
Face to face DimensionASME B16.10 , API 6D
Fire SafetyAPI 607, API 6FA
Testing StandardAPI 598
Flange DetailsASME B16.5 up to 24″
ASME B16.47 26″ and Above
Butt-Weld End DetailsASME B16.25
Size Range2″ – 48″ (DN50 – DN1200)
ASME Class150#, 300#, 600#, 900#, 1500#, 2500#
Bore TypeFull Bore, Reduced Bore
Emergency greaseInjection Device Soft Sealing
Materials

Plate or Pipe steel: A3/20#/SS304/TP304/SS316/TP316,

Forged Steel: A105 / LF2 / LF3 / F316 / F304 /F316L / F51 / F55 / F6a /

Casting Steel: WCB / LCB /LCC / CF8M / CF8 / CF3M / 4A / 6A / Inconel

Ball&StemF6a / F316 / F304 / F316L / F51 / F55 / Inconel
SeatsSoft Sealing or Metal to Metal
OperationLever, Gearbox, Pneumatic Actuator, Electric Actuator

Applications


Isolating valve for maintenance-free above- and below-ground installations in pipelines, on compressor stations and platforms.
Min. temperature range -60°C to +50°C
Standard temperature range -29°C to +50°C
Max. temperature range -29°C to +160°C


Features & advantages


Upstream Sealing At low pressure, seat-to-ball contact is maintained by Belleville springs. At higher pressures, seat contact is reinforced by line pressure.


Automatic Internal Relief of Body Pressure Relief of excess body cavity pressure is automatic, avoiding dangerous pressure buildup. Any pressure exceeding downstream line pressure by approximately 200 psi pushes the downstream seat away from the ball, allowing the pressure to relieve into the pipeline.


Rotating Seat Rings The exclusive rotating seat feature is standard in the teko fully welded ball valve sizes 14” (350 mm) and larger. Both seats rotate 15 degrees each time the valve is closed, exposing a new pinch point and evenly distributed seat wear


The pinch point is the area of the seat insert that experiences an increased velocity when the valve is seated closed and unseated open. This is where the seat seal experiences the most wear, and in most valves, where a leak path begins. By rotating the seat ring, the pinch point wear is distributed throughout the seat seal, providing an increase in seat life.


Low-torque Operation

Regardless of size or pressure rating, every teko fully welded ball valve is trunnion mounted. High-strength forged stems are located in PTFE impregnated stainless steels bearings for smooth operation. Trunnion mounted stems absorb the thrust from line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure, operating torque stays low.


Double Block-and-bleed

Whether in the fully open or fully closed position, pressure on each side of the ball is blocked from the body cavity by the seat ring. The body cavity can then be bled down or drained through the body port. When you block-and-bleed a teko fully welded ball valve, the following can be accomplished:



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