Pneumatic Knife Gate Valve

Introduction

Knife gate valve is also named slurry valve, mud valve. Its opening and closing part is a gate.The medium is cut by a blade-shaped gate that can cut fiber materials; It rises and falls in the side guide groove, and is pressed against the valve seat by the lugs at the bottom. If a higher medium tightness is required, an O-shaped sealing valve seat can be used to achieve two-way sealing. The knife gate valve has a small installation space, low working pressure, long service life and simple maintenance.

Suitable Medium：Molasses, pulp, sewage, coal pulp, ash, slag water mixture.

Working Temperature: 0℃～80℃

Application field：Chemistry, water treatment, coal power plants, food, paper, petroleum.

Product Advantages

1. Precision casting valve body, fine appearance, no trachoma.

2. Valve wedge is burnished smoothly 3 times and polished 5 times to ensure the sealing porformance.

3. Valve stem is equipped with bearing to reduce friction.

4. Rubber coated PTFE packing seal, which can increase the elasticity and reduce the leakage of upper seal.

5. U-shaped sealing ring of the seat to ensure the strong conbation between valve seat and body.

6. Each valve will be tested shell and sealing pressure before leaving factory.

7. 250 μm epoxy coating, it can effectively prevent corrosion and rust.

8. The protection level of pneumatic actuator is IP67.

Parameters

Parameter Information：

Optional	1	2	3	7	8
	Body	Seat	Wedge	Stem	Actuator
	DI/WCB/CF3/ CF3M/CF8/ CF8M	Rubber/Stainless Steel/Hard Alloy/PTFE	WCB/201/CF3/ CF3M/CF8/ CF8M	2Cr13/304	Pneumatic actuator

Executive standard：

Name	Design and manufacture	Face to face Length	Pressure Test	End Flange
Reference Standard	JB/T 8691-2013 MSS SP-81	GB/T 12221-2005 MSS SP-81	GB/T 13927-2008	GB/T 9113-2010 DIN EN 1092-1 ASME B16.5

Material of Main Parts:

Name	1-Body	2-Seat	3-Wedge	7-Stem	8-Actuator
Material	WCB	EPDM	SS304	SS420	Pneumatic actuator

Dimensions：

Size			PN10			PN16			150LB
DN	NPS(inch)	L	D1	N-M	Z-φC	D1	N-M	Z-φC	D1	N-UNC	Z-φC
50	2''	48	125	2-M16	2-φ18	125	2-M16	2-φ18	120.7	2-UNC5/8-11	2-φ19
65	2 1/2''	48	145	2-M16	2-φ18	145	2-M16	2-φ18	139.7	2-UNC5/8-11	2-φ19
80	3''	51	160	2-M16	2-φ18	160	2-M16	2-φ18	152.4	2-UNC5/8-11	2-φ19
100	4''	51	180	2-M16	2-φ18	180	2-M16	2-φ18	190.5	2-UNC5/8-11	2-φ19
125	5''	57	210	2-M16	2-φ18	210	2-M16	2-φ18	215.9	2-UNC3/4-10	2-φ22
150	6''	57	240	2-M20	2-φ22	240	2-M20	2-φ22	241.3	2-UNC3/4-10	2-φ22
200	8''	70	295	2-M20	2-φ22	295	2-M20	2-φ22	298.5	2-UNC3/4-10	2-φ22
250	10''	70	350	4-M20	2-φ22	355	4-M24	2-φ26	362	4-UNC7/8-9	2-φ25
300	12''	76	400	4-M20	2-φ22	410	4-M24	2-φ26	431.8	4-UNC7/8-9	2-φ25

Application

A Chilean chemical plant purchases Bundor PTFE-lined butterfly valve.

butterfly valves, copper ball valves &copper gate valves