D641X pneumatic flanged soft seal butterfly valve

Product Name:	Pneumatic flanged soft seal butterfly valve	Product Model:	D641X, D641F
Nominal diameter:	DN50 to DN1000	Seat seal:	Butyl green rubber, tef-lon
Nominal pressure:	1.0Mpa to 1.6MPa	Connection method:	Pair clip, flange
Applicable temperature:	-20ºC to +150ºC	Drive mode:	Manual, worm gear, electric, pneumatic
Body material:	Cast iron, ductile iron, cast steel, stainless steel	Manufacturing standard:	GB, German DIN, American API, ANSI
Applicable media:	Water, oil, gas, powder, liquid	Manufacturer:	Xuan Cheng Valve Co., LTD

Product Description

D641X pneumatic flange soft seal butterfly valve is composed of pneumatic piston actuator, rubber seal butterfly valve and carbon steel or stainless steel valve plate, valve stem. The pneumatic flange soft seal butterfly valve is suitable for temperature ≤120ºC such as food, medicine, chemical industry, petroleum, electric power, textile, paper and other water supply and drainage, gas pipeline for regulating flow and intercepting media.

Main features

(1) Novel design, reasonable, unique structure, light weight, fast opening and closing.
(2) small operating moment, easy operation, labor-saving dexterity.
(3) Can be installed in any position, easy maintenance.
(4) the seal can be replaced, and the sealing performance is reliable to achieve bi-directional sealing and zero leakage.
(5) The sealing material has the characteristics of aging resistance, corrosion resistance and long service life.

Design standard

Design criteria	GB/T12238-1989
Flange connection dimensions	GB/T9113.1-2000; GB/T9115.1-2000; JB78
Structural length	GB/T12221-1989
Pressure test	GB/T13927-2000; JB/T9092-1999

Technical parameters

Nominal diameter DN(mm)	DN50 to 1000mm
Nominal pressure (MPa)	PN1.0, 1.6, 2.5MPa
Body form	Straight through casting body
Connection form	Flange type, sandwich type
Spool form	Butterfly plate
Sealing packing	Flexible graphite, tef-lon
Basic error	With positioner: less than ±2% of full stroke
Return difference	With positioner: less than ±2% of full stroke
Control mode	Switch type (switch two position control), regulation type (4 ~ 20mA control)

Pneumatic actuator parameters

Actuator type number	GT, AT, AR, AW series single and double acting pneumatic actuators
Air supply pressure	0.4 to 0.7MPa
Air source interface	G1/4", G1/8", G3/8", G1/2"
Ambient temperature	-30 ~ +70ºC
Form of action	Single acting actuator: gas close type (B)-- valve position open (FO) when gas is lost; Gas open (K)-- valve position closed (FC) Double acting actuator: gas close (B)-- valve position hold (FL) when gas is lost; Air open (K)-- valve position hold (FL) when air is lost
Accessories available	Positioner, solenoid valve, air filter pressure reducer, holding valve, stroke switch, valve position transmitter, handwheel mechanism, etc

Using a new series of pneumatic actuators, there are double acting and single acting (spring return), rack and pinion drive, safe and reliable; Large diameter valve adopts series AW type pneumatic actuator fork type transmission, reasonable structure, large output torque, double acting and single acting.
1, gear type double piston, output torque is large, small volume.
2, cylinder selection of aluminum gold material, light weight, beautiful appearance.
3. Manual operation mechanism can be installed at the top and bottom.
4, rack type connection can adjust the opening Angle, rated flow.
5, the actuator can choose live signal feedback indication and various accessories to achieve automatic operation.
6. IS05211 standard connection provides convenience for the installation and replacement of the product.
7, both ends of the adjustable screw can make the standard product in 0° and 90° have a ±4° adjustable range. Ensure the synchronization accuracy with the valve.

Parts Materials

Part name	Main materials
Valve body	Gray cast iron, ductile cast iron, cast steel, alloy steel, stainless steel
Butterfly plate	Gray cast iron, spheroidal cast steel, cast steel, stainless steel and special materials
Sealing Rings	Various rubber, tef-lon
Valve stem	2Cr13, stainless steel
Stuffing	O-rings, flexible graphite O

Performance specification

Nominal diameter	DN (mm)	50 to 1000
Nominal pressure	PN (MPa)	0.6	1.0	1.6
Test pressure	Strength test	0.9	1.5	2.4
	Seal test	0.66	1.1	1.76
	Gas seal test	0.6	0.6	0.6
Applicable media	Air, water, sewage, steam, gas, oil, etc.
Driving form	Pneumatic drive

Sealing material and applicable temperature

Variety of materials	Neoprene	Butyl rubber	Ethylene-propylene rubber	Tef-lon	Silicone rubber	Fluororubber	Natural rubber	Nylon
English abbreviation	CR	NBR	EPDM	PTFE	SI	VITON	NR	PA
Model number	X or J	XA or JA	XB or JB	F or XC, JC	XD or JD	XE or JE	X1	N
Resistance to maximum temperature	82 ºC	93 ºC	150 ºC	232 ºC	250 ºC	204 ºC	85 ºC	93 ºC
Minimum temperature resistance	To 40 ºC	To 40 ºC	To 40 ºC	- 268 ºC	- 70 ºC	- 23 ºC	- 20 ºC	- 73 ºC
Applicable operating temperature	0 ~ + 80 ºC	- 20 ~ + 82 ºC	- 40 ~ + 125 ºC	- 30 ~ + 150 ºC	- 70 ~ + 150 ºC	- 23 ~ + 150 ºC	- 20 ~ + 85 ºC	- 30 ~ + 93 ºC

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