TRUNNION MOUNTED BALL VALVE

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FEATURES

Up Stream Sealing Two-way Valve:
The up stream seal of the valve is fulfilled by the advanced spring pre-tighten seat package which has a feature of self-tightness. The two-way valve has two seats that can be sealed in bi-directions, so there's no limitation of flow direction during installation.
Double Block & Bleed Valve:
Being up streamside sealing, the valve can bleed out the trapped fluid in the body cavity when the valve is in fully open or fully close position. Seats of up stream and down streamside intercept the fluid. So, the stem packing or O-ring may be replaced under working pressure. And to bleed the dirty fluid periodically can reduce damage of the sealing surface and prolong the service life of the valve.
Automatic Relief of the Cavity:
If the pressure of the body cavity unusually goes up, it can be automatically relieved by compressing the spring in the spring pre-tighten seat package.
Full Bore or Reduce Bore:
Either full bore or reduce bore can be available according to customers' requirements. For full bore type, the diameter of the valve ball bore is as same as the pipe size, which facilitates pigging operation.
Fireproof Design:
When the non-metal seat are softened and burnt in case of the fire or unusual temperature increase, the seat retainer, under the duty of the spring, will touch with the ball and form a metal-to-metal contact, which can prevent internal leak; meanwhile, the middle flange and the upper part and lower part of the stem will form a metal-to-metal contact which can prevent external leak and conform to API 6FA or API 607.Please note that flexible graphite packing and gaskets should be used to assure no external leaking in severe fireproof condition(specify).
Auxiliary grease-jet Valve:
If the seat and sealing parts of the system are damaged, the sealant grease will be injected through a grease-jet valve to perform auxiliary and temporary sealing action.
Locking Device:
The valve is fitted with a locking device that can prevent the valve from being operated by error, and can ensure that the valve is always at the correct position.
Reliable Operation:
TFE is adopted for the seat and the stem bearing, the relative movement at the bearing portion requires less operational torque because of less friction of TFE in addition. The long time lubrication of sealant makes the operation more effective.
Various kinds of Actuation Methods:
The various methods adopted for effective actuation include manual, pneumatic, electric, hydraulic and hydro-pneumatic etc

APPLICATION SPECIFICATIONS

· Design and manufacturing conform to API 6D
· Face to face dimensions conform to API 6D
· Dimensions of flanges conform to ANSI B16.5（2" to 24"）, MSS SP-44 (28", 32", 36"), and API 605 (40")
· Butt-welded ends conform to ANSI B16.25
· Inspection and test conform to API 598
· Working Temperature: -28～100℃

MATERIALS

Parts	Carbon Steel	Stainless Steel
Parts	Carbon Steel	304	304L	316	316L
Body	A216-WCB	A351-CF8	A351- CF3	A351- CF8M	A351- CF3M
Body Cap	A216-WCB	A351-CF8	A351- CF3	A351- CF8M	A351- CF3M
Ball	A216-WCB+HCr	A351-CF8	A351- CF3	A351- CF8M	A351- CF3M
Seat	PTFE; Burnt Carbon Faber; Metal + Rubber
Stem	A182-F6a	A182-F304	A182-F304L	A182-F316	A182-F316L
Seat ring	A105+Zn	A182-F304	A182-F304L	A182-F316	A182-F316L
Stem Packing	PTFE; Carbon Faber
bearing	Metal Backed PTFE; Burnt Carbon Faber
Ring for Packing	A182-F6a	A182-F304	A182-F304L	A182-F316	A182-F316L
Spring	3yc-7
Stud	A193-B7	A193-B8	A193-B8	A193-B8M	A193-B8M
Nut	A194-2H	A194-8M	A194-8M	A194-8M	A194-8M
Cover	A216-WCB, A105
Drain Plug	A105	A182-F304	A182-F304L	A182-F316	A182-F316L

OEMic reserves the rights to modify the design and construction without prior notice.

DIMENSIONS AND WEIGHTS