Hidden stem knife type gate valve-Global supplier

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15900615511/18918136616
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B-21H, Yueda International Building, 1118 Changshou Road, Shanghai

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Hidden stem knife type gate valve

Knife gate valves use metal to metal hard seals or metal to rubber soft seals. During the opening and closing process, the gate and sealing surface ar

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Product details

Knife gate valves use metal to metal hard seals or metal to rubber soft seals. During the opening and closing process, the gate and sealing surface are designed with special features, resulting in minimal friction and durability.

Hidden stem knife type gate valve--Detailed Introduction

product overview

Structural characteristics
Knife gate valves use metal to metal hard seals or metal to rubber soft seals. During the opening and closing process, the gate and sealing surface are designed with special features, resulting in minimal friction and durability.
The upper seal of this knife shaped gate valve breaks through the conventional sealing form by adopting an upper cover structure, which changes the upper seal from a large rectangular seal to a small circular seal, greatly improving the sealing performance. On the basis of circular sealing, the advanced floating sealing structure currently used internationally has been adopted, which enables the upper seal to reach the same lifespan as the pipeline, thereby improving the overall service life of the valve.
After installing a sealing device on the top of the handwheel, this type of gate valve can keep all the moving parts of the valve in a closed state, and the screw drive of the gate and valve stem will not get stuck due to dry lubricating oil. Especially suitable for long-term normal operation in harsh environments with dust and dryness.

Applicable Medium
Gold ore powder, tailings, pulp, wood pulp, fibers, dust, chemical treatment wastewater, sedimentation tanks, mineral sands, slag, coal slurry, asphalt, silo outlets, fruits, grains, cement slurry, slaughterhouse wastewater, pneumatic conveying pipelines or beer brewing media.

Main performance specifications

Nominal pressure（MPa)	Shell test（MPa)	Sealing test（MPa)	operation temperature	Applicable Medium
1.0 1.6	1.5 2.4	1.1 1.8	≤100℃ ≤100℃	Pulp, wastewater, coal slurry, ash, slag water mixture

Main component materials

Body and lid	Gate valve	valve stem	Sealing surface
Stainless steel, carbon steel, gray cast iron	Carbon steel, stainless steel	stainless steel	Rubber, PTFE, stainless steel, hard alloy

Main appearance and connection dimensions(mm)

MPa	DN	L	D	D1	D2	H	N-M	D0	W(Kg)
1.0	50	43	160	125	100	330	4-M16	180
	65	46	180	145	120	360	4-M16	180
	80	46	195	160	135	390	4-M16	220
	100	52	215	180	155	440	8-M16	220
	125	56	245	210	185	510	8-M16	230
	150	56	280	240	210	600	8-M20	280
	200	60	335	295	265	700	8-M20	360
	250	68	390	350	320	840	12-M20	360
	300	78	440	400	368	960	12-M20	400
	350	78	500	460	428	1110	16-M20	400
	400	102	565	515	482	1250	16-M22	400
	450	114	615	565	532	1380	20-M22	530
	500	127	670	620	585	1530	20-M22	530
	600	154	780	725	685	1800	20-M27	600
	700	165	895	840	800	2150	24-M27	600
	800	190	1010	950	898	2420	24-M30	680
	900	203	1110	1050	1005	2680	28-M30	680
	1000	216	1220	1160	1115	3100	28-M30	700
	1200	254	1450	1380	1325	3450	32-M36	800
1.6	50	43	160	125	99	330	4-M16	180
	65	46	185	145	120	360	4-M16	180
	80	46	200	160	135	390	8-M16	220
	100	52	220	180	155	440	8-M16	220
	125	56	250	210	185	510	8-M16	230
	150	56	285	240	210	600	8-M20	280
	200	60	340	295	265	700	12-M20	360
	250	68	405	355	310	840	12-M22	360
	300	78	460	410	375	960	12-M22	400
	350	78	520	470	435	1110	16-M22	400
	400	102	580	525	485	1250	16-M27	400
	450	114	640	585	545	1380	20-M27	530
	500	127	715	650	609	1530	20-M30	530
	600	154	840	770	720	1800	20-M36	600
	700	165	910	840	788	2150	24-M36	600
	800	190	1025	950	898	2420	24-M36	680
	900	203	1125	1050	998	2680	28-M36	680
	1000	216	1255	1170	1110	3100	28-M42	700
	1200	254	1485	1390	1325	3450	32-M48	800

Structural diagram

Installation size

[Printing]

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