API6d Manual Three Pieces Trunnion Mounted Ball Valve

Material: Stainless Steel Driving Mode: Turbine Channel: Straight Through Type Type: Fixed Ball Valve Temperature: Normal Temperature Size: 2′′-40′′ Ends Con: RF,Rtj,Sw,Bw Trademark: FYV Origin: Wenzhou, Zhejiang Connection Form: Flange Nominal Pressure: ANSI CLASS 150-900 Structure: Fixed Ball Valve Function: Blow-Down Valve Application: Industrial Usage, Water Industrial Usage, Household Usage Class: 150lb-1500lb O-Ring Sealing: PTFE,NBR,Rptfe Specification: CE, SGS HS Code: 8481804090 Double Piston Effect Ball Valve

Trunnion Mounted Ball valves are straight-through flow valves which provide positive shutoff with minimal pressure drop and flow turbulence. The barrier to flow is a ball which is rotated 90 degrees to the direction of flow.

In Trunnion Mounted valves, the ball is held in a fixed axial position by upper and lower stems (trunnions) and can move only in a rotational mode. The resilient seats are contained in metal carriers which are spring loaded against the ball. Hoeever metal seats normally tungsten carbide coated can also be used. Line pressure applied to a close valve increases the spring load on the upstream seat to effect a tight seal. The primary seating is therefore on the upstream seat permitting trunnion mounted ball valves to be used for

"block and bleed" service.

A variation of this is the Double Piston valve in which the upstream seat works as a standard trunnion mounted seat, but the downstream seat can also be pulled on with pressure by pressure in the body cavity, this is often used in top entry welded in line ball valves were a test can be applied into the body after an over haul without pressure testing the entire pipeline.
Because the stem motion from full open to full closed is a 90 degree rotation, ball valves are ideally suited for automatic operation.
 

Type	(Lb)	/ºC
Z41Y-150(Lb)~600(Lb)	150~600	≤425
Z41Y-150(Lb)P~600(Lb)P	150~600	≤150

 

Type	Material
	Body and Bonnet	Disc	Stem	Filling,Gasket
Z41Y-150(Lb)~600(Lb)	WCB	2Cr13	WCB	Viton,PTFE,RPTFE,NBR
Z41Y-150(Lb)P~600(Lb)P	ZG1Cr18Ni9Ti	1Cr18Ni9Ti	ZG1Cr18Ni9Ti

 
 

DN/in	L	H	D	D1	D2	b	z×Φd	D0
2	178	409	152	120.5	92	19.1	4×Φ19	200
3	203	470	190	152.5	127	23.9	4×Φ19	250
4	229	590	229	190.5	157	23.9	8×Φ22	300
6	267	630	279	241.5	216	25.4	8×Φ22	300
8	292	960	343	298.5	270	28.5	8×Φ22	350
10	330	1158	406	362	324	30.2	12×Φ25	400
12	356	1378	483	432	381	31.8	12×Φ25	450
14	381	1543	533	176.5	413	35	12×Φ29	500
16	406	1738	597	539.5	470	36.6	16×Φ29	600
18	432	1959	635	578	533	39.7	16×Φ32	600
20	457	2214	698	635	584	42.9	20×Φ32	680
24	508	2599	813	749.5	692	47.7	20×Φ35	760
30	610	3183	985	914	857	74.5	28×Φ35	915
36	711	3737	1170	1086	1022	90.5	32×Φ41	915

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