Manual Lug Type Knife Gate Valve

Size Range:2″ to 24″ (DN50-DN600)

Connection Options: Lug

Working Pressure:PN6/PN10/PN16

Working Temperature:-29°C to 425°C

Sealing Options:Metal-to-Metal, Resilient Seat, Graphite, PTFE

Manufacturing Method:Cast, Forged, Machined

Applicable Medium:Water, Oil, Gas, Steam, Chemical Fluids

Product Overview

A manual knife gate valve is a cost-effective isolation valve designed for on/off control in pipelines carrying slurry, viscous fluids, or solids-laden media. Operated by a handwheel or lever, it uses a sharp-edged gate to cut through flow media and deliver reliable shut-off with low pressure loss. Manual knife gate valves are widely used in wastewater treatment, mining, pulp and paper, cement, and industrial water systems, where simple operation, durability, and easy maintenance are essential.

Product Features

Manual handwheel or lever operation for simple and reliable control
Knife-edge gate effectively handles slurry, pulp, and solids-containing media
Provides tight shut-off with low flow resistance
Ideal for water treatment, mining, pulp & paper, and wastewater applications
Compact, lightweight design for easy installation
Available in cast iron, carbon steel, and stainless steel
Suitable for frequent operation and harsh working conditions
Low maintenance design with long service life

Specification Parameters

PN (MPa)	Case Test Pressure (MPa)	Seal Test Pressure (MPa)	Working Temperature (°C)	Applicable Medium
1.0	1.5	1.1	Rubber ≤ 80°C	Pulp, sewage, coal slurry, ash, syrup, slag–water mixture
1.6	2.4	1.8	≤ 425°C	Pulp, sewage, coal slurry, ash, syrup, slag–water mixture

Component	Material
Body, Cover	Stainless steel, carbon steel, gray cast iron
Gate	Carbon steel, stainless steel
Stem	Stainless steel
Sealing Surface	Rubber, PTFE, stainless steel, hard alloy

Main External and Connection Dimension

PN (MPa)	DN (mm)	L	D	D1	D2	H	N–M	D0	Weight (kg)
1.0	50	48	160	125	100	285	4–M16	180	8
	65	48	180	145	120	298	4–M16	180	10
	80	50	195	160	135	315	4–M16	220	12
	100	50	215	180	155	365	8–M16	220	14
	125	57	245	210	185	400	8–M16	230	22
	150	57	280	240	210	475	8–M20	280	29
	200	70	335	295	265	540	8–M20	360	38
	250	70	390	350	320	630	12–M20	360	66
	300	76	440	400	368	780	12–M20	400	100
	350	76	500	460	428	885	16–M20	400	119
	400	89	565	515	482	990	16–M22	400	195
	450	89	615	565	532	1100	20–M22	530	285
	500	114	670	620	585	1200	20–M22	530	389
	600	114	780	725	685	1450	20–M27	600	529
	700	130	895	840	800	1700	24–M27	600	790
	800	130	1010	950	905	2000	24–M30	680	—
	900	140	1110	1050	1005	2300	28–M30	680	—
PN (MPa)	DN (mm)	L	D	D1	D2	H	N–M	D0	Weight (kg)
1.6	50	48	160	125	99	285	4–M16	180	8.5
	65	48	185	145	118	295	4–M16	180	10.7
	80	50	200	160	132	315	8–M16	220	13
	100	50	220	180	156	365	8–M16	220	15
	125	57	250	210	184	400	8–M16	230	23.5
	150	57	285	240	211	475	8–M20	280	31
	200	70	340	295	266	540	12–M20	360	40.7
	250	70	405	350	319	630	12–M24	360	70
	300	76	460	400	370	780	12–M24	400	107
	350	76	520	460	429	885	16–M24	400	129
	400	89	580	515	480	990	16–M27	400	215
	450	89	640	565	548	1100	20–M27	530	305
	500	114	715	620	609	1200	20–M30	530	410
	600	114	840	725	720	1450	20–M33	600	550
	700	130	910	840	794	1700	24–M33	600	820
	800	130	1025	950	901	2000	24–M33	680	—
	900	140	1125	1050	1001	2300	28–M36	680	—

Specification Applications

Wastewater and sewage treatment systems
Mining and mineral processing slurry pipelines
Pulp and paper stock and fibre handling lines
Power plants handling ash and by-products
Chemical processing with viscous or solid-laden media
Cement and bulk material conveying systems
Industrial water and utility isolation applications

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Manual Lug Type Knife Gate Valve

Product Overview

Product Features

Specification Parameters

Main External and Connection Dimension

Specification Applications

Features

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