Knife Gate Valve

Type: Knife Gate Valve
Design & Manufactured to API 6D, ASME B16.34 or Equivalent
P.T Ratings to ASME B16.34
Face to Face dimensions to ASME B16.10
Flanged Ends to ASME B16.5
Butt-weld Ends to ASME B16.25
Threaded Ends to ASME B1.20.1
Socket-weld Ends to ASME B16.11
Valves Marking to MSS SP-25
Inspect & Tested to API 598
Size Ranges from 1 1/2” thru 24”
Pressure Ratings from Class 600 to Class 2500, PN110 to PN420
Structures in Bolted or Pressure Sealed Union Cover
Ends Connections in Flanged R.F or RTJ, Threaded NPT, BSPT, Welded S.W, B.W and Grooved
Body Materials available in Cast Carbon Steel, Low Temp. Carbon Steel, Alloy Steel, Stainless Steel, Monel, Alu. Bronze etc.
Trim Materials available in 13%Cr, F11, F22, SS304, SS304L, SS316, SS316L and other specials.

What are Knife Gate Valves

Knife gate valve, also known as slurry valve, its opening and closing member is the gate, the direction of movement of the gate is perpendicular to the direction of the fluid, by the knife blade gate can cut fiber material to cut off the medium, the gate has two sealing surfaces, the most commonly used mode gate valve two sealing surfaces form a wedge, wedge angle varies with the parameters of the valve, usually 5 °, wedge type knife gate valve gate can be made into a The gate of the wedge-type knife gate can be made into a whole, called rigid gate; can also be made into a gate that can produce a slight deformation to improve its process, to make up for the deviation of the sealing surface angle in the process, this gate is called a resilient gate. The valve body actually does not exist in the chamber, the gate in the side guide groove to lift, and by the bottom of the lug pressed on the seat, if you need to achieve a high media sealing, O-seal seat can be used to achieve a two-way seal. Knife gate valve has a smaller installation space, low working pressure, not easy to accumulate debris, and lower price.
Knife gate valve closed, the sealing surface can only rely on media pressure to seal, that is, rely on media pressure will be the sealing surface of the gate to the other side of the seat to ensure the sealing surface of the seal, which is self-sealing, most of the gate valve is used to force the seal, that is, when the valve is closed, to rely on external force to force the gate to the seat, to ensure the sealing surface of the seal. This type of valve in the pipeline should generally be installed vertically.
Knife gate valve drive mode: manual, sprocket, electric, pneumatic, hydraulic, bevel gear, electric control and pneumatic-hydraulic drive mode. Knife gate valve shape: open stem, concealed stem two kinds. Knife gate valve material: cast iron, cast steel, carbon steel, stainless steel, fluorine lining, etc.
Knife gate valve seal: hard seal, soft seal, single-sided seal, double-sided seal and other materials seal.
Ultra-thin knife gate valve with its small size, low resistance, light weight, easy to install, easy to disassemble and other advantages completely solve the common gate valve, flat gate valve, ball valve, globe valve, regulating valve, butterfly valve and other types of valves with large resistance, weight, difficult to install, large footprint and other difficult problems. After the emergence of knife gate valve, a large number of general cut-off class valves and regulating valves have been replaced by the. The world’s largest amount of knife gate valve is the United States and Japan.
Knife gate valves are used in the following areas.

• 1. Mining, washing coal, steel industry – for washing coal pipeline, filter slurry pipeline, etc., ash discharge pipeline.
• 2. Purification devices – for wastewater, slurry, dirt and clarified water with suspended matter.
• 3. Paper industry – for pulp of any consistency, material-water mixtures.
• 4. Power station ash removal – for ash slurry.

We focus on valves in standard and special materials as customer request.
Our main materials show as the follows:
Any request for other materials, please contact our machinery sales or engineering team on email.

Special Material	Titanium or Titanium alloy series	Titanium (Gr.2,Gr.3,Gr.5,Gr.7,Gr.12)
	Nickel alloy series	Ni6,Ni200,Ni201
		Monel 400,Monel k500
		Inconel 600/625/690/750
		Incoloy 800/825/800H/800HT
		Hastelloy B3/C/C4/C22/C276/G30
	Zirconium alloy series	Zirconium 702/703/705
	Bronze alloy series	Nickel aluminum bronze C95800
	(Super) Duplex Steel	ASTM F51/F53/F55
	Other corrosion resistance	Alloy 20,AISI 321,310,904L
Normal Material	Carbon Steel	WCB,WCC,LCB,LCC,A105N,LF2
	Alloy Material (Low Temperature)	LC1,LC2,LC3,LF3
	Alloy Material (High Temperature)	WC1,WC6,WC9,C5,C12A
	Stainless Steel	CA15,CF8,CF8M,CF3,CF3M

Dimensions of Bellow Seal Gate Valve

DIN2632 PN10

DN	L	D	D1	D2	D0	N-Th	d	H1
50	172	165	125	99	180	4-M16	Ø18	260
65	172	185	145	118	200	4-M16	Ø18	292
80	172	200	160	132	200	8-M16	Ø18	320
100	172	220	180	156	240	8-M16	Ø18	358
125	174	250	210	184	260	8-M16	Ø18	395
150	174	285	240	211	280	8-M20	Ø23	450
200	180	340	295	266	300	8-M20	Ø23	532
250	220	395	350	319	320	12-M20	Ø23	670
300	255	445	400	370	350	12-M20	Ø23	758
350	255	505	460	429	400	16-M20	Ø23	857
400	281	565	515	480	450	16-M24	Ø27	946
450	305	615	565	530	500	20-M24	Ø27	1023
500	350	670	620	582	500	20-M24	Ø27	Gear
600	369	780	725	682	–	20-M27	Ø30	Gear
700	372	895	840	794	–	24-M27	Ø30	Gear
800	405	1015	950	901	–	24-M30	Ø33	Gear
900	480	1115	1050	1001	–	28-M30	Ø33	Gear
1000	535	1230	1160	1112	–	28-M33	Ø36	Gear

ANSI 150LB

DN	L	D	D1	D2	D0	N-Th	d	H1
2″	172	152	121	92	180	4-5/8″	Ø19	260
2-1/2″	172	178	140	105	200	4-5/8″	Ø19	292
3″	172	191	153	127	200	4-5/8″	Ø19	320
4″	172	229	191	157	240	8-5/8″	Ø19	358
5″	174	254	216	186	260	8-3/4″	Ø22	395
6″	174	279	242	216	280	8-3/4″	Ø22	450
8″	180	343	299	270	300	8-3/4″	Ø22	532
10″	220	406	362	324	320	12-7/8″	Ø25	670
12″	255	483	432	381	350	12-7/8″	Ø25	758
14″	255	533	476	413	400	12-1″	Ø29	857
16″	281	597	540	470	450	16-1″	Ø29	946
18″	305	635	578	533	500	16-1 1/8″	Ø32	1023
20″	350	699	635	584	500	20-1 1/8″	Ø32	Gear
24″	369	813	750	691	–	20-1 1/4″	Ø35	Gear
28″	372	927	864	800	–	28-1 1/4″	Ø35	Gear
32″	405	1060	978	914	–	28-1 1/2″	Ø41	Gear
36″	480	1170	1086	1022	–	32-1 1/2″	Ø41	Gear
40″	535	1290	1200	1124	–	36-1 1/2″	Ø41	Gear