March 13, 2024 by Brina

Flanged Gate Valves

Flanged gate valves is very common on pipeline. The opening and closing part of flanged gate valve is the wedge, the direction of movement of the wedge is perpendicular to the direction of the fluid, the gate valve can only be fully opened and fully closed. It’s not for the used of adjustment. The wedge has two sealing surfaces, and the two sealing faces commonly form wedge shape.

Flanged gate valve is installed onto the pipeline by the flanges at both ends. This type of valve should generally be installed horizontally in the pipeline. When the gate valve is closed, the sealing surface can be sealed only by medium pressure, i.e. by pressing the sealing surface of the wedge to the seat on the other side to ensure the sealing is perfect.

The wedge of the gate valve moves in a straight line with the stem.  If the stem moves up and down together withe the wedge, the gate valves is called OS & Y gate valve. If the stem keep the same position during close/open operation, the gate valve is called NRS gate valve.

Different Types of Flanged Gate Valves

ZMIN-A1 Metal Seated Flanged Gate Valves

ZMIO-A1 O.S.&Y. Flanged Gate Valves

ZRIN-A1 Resilient Seated Flanged Gate Valves

ZRIO-A1 DI Body Flanged Gate Valves

ZMIN-D41 Ductile Iron Body Flanged Gate Valves

ZMIO-D41 DIN3352 F4 Flanged Gate Valves

ZMIN-D51 NRS DIN3352 F5 Flanged Gate Valves

ZMIO-D51 O.S.&Y. DIN3352 F5 Flanged Gate Valves

ZRIN-D41 Resilient Seated Flanged Gate Valves

ZRIN-D51 NRS DIN3352 F5 Flanged Gate Valves

ZRIN-SC1 NRS Socket End Flanged Gate Valves

ZMSO-D1 Stainless Steel Flanged Gate Valves

ZMSO-A1 150/300/600LBS Flanged Gate Valves

ZMWO-A1 WCB Body Flanged Gate Valves

Flanged Gate Valves Technical Specifications

Nominal diameter		Unit	Main connection dimension
Inch	DN		L	D	D1	D2	b	z-∅d	W
2″	50	mm	178	152	120.5	92	19.1	4 – 19	200
2-1/2″	65	mm	190	178	139.5	105	18	4 – 19	200
3″	80	mm	203	190	152.5	127	23.9	4 – 19	250
4″	100	mm	229	229	190.5	157	23.9	8 – 19	250
5″	125	mm	254	254	216	186	23.9	8 – 22	250
6″	150	mm	267	279	241.5	216	25.4	8 – 22	300
8″	200	mm	292	343	298.5	270	28.5	8 – 22	350
10″	250	mm	330	406	362	324	30.2	12 – 25.4	400
12″	300	mm	356	483	432	381	31.8	12 – 25.4	450
14″	250	mm	381	533	476.5	413	35	12 – 29	500
16″	400	mm	406	597	539.5	470	36.6	16 – 29	600
18″	450	mm	432	635	578	533	39.7	16 – 32	600
20″	500	mm	457	698	635	584	42.9	20 – 32	680
24″	600	mm	508	813	749.5	692	47.7	20 – 35	760

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