American standard pneumatic butterfly valve

NegotiableUpdate on 02/06

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Overview

Product Introduction: The American standard D671X pneumatic soft seal butterfly valve adopts a double eccentric structure, which has a sealing function that becomes tighter as it is closed, and the sealing performance is reliable. The sealing auxiliary material is paired with stainless steel and nitrile oil resistant rubber, which has a long service life.

Product Details

American standard pneumatic butterfly valve

2、 Characteristics of American standard D671X pneumatic soft seal butterfly valve

1. This valve adopts a double eccentric structure, which has a sealing function that becomes tighter as it is closed, and the sealing performance is reliable.
2. The sealing auxiliary material is paired with stainless steel and nitrile oil resistant rubber, which has a long service life.
3. The rubber sealing ring can be located on the valve body or on the butterfly plate, and can be suitable for different characteristics of media for users to choose from.
4. The butterfly plate adopts a frame structure, with high strength, large overcurrent area, and low flow resistance.
5. The overall baking paint can effectively prevent rust and can be used in different media as long as the sealing material of the valve seat is replaced.
6. This valve has a bidirectional sealing function and is not controlled by the flow direction of the medium or the spatial position during installation. It can be installed in any direction.
7. This valve has a unique structure, flexible operation, labor-saving, and convenience.

3、 Standard parameter table for American standard D671X pneumatic soft seal butterfly valve

Nominal Diameter		50mm~1200mm
Flange standard		ISO7005-2 1988
Maximum working pressure		1.6MPa
Shell Test Pressure		1.5 times the work pressure
Seal test pressure		1.1 times the work pressure
Working temperature range		NBR valve seat -10 º C~80 º C, EPDM valve seat -20 º C~120 º C
Allow long-term use of temperature		NBR valve seat 0 º C~60 º C, EPDM valve seat 0 º C~100 º C
material		(See the "Optional Material List" section)
structure size		ISO5752-88
Driving Type	handle	50mm~300mm
	worm gear	50mm~1200mm
	aerodynamic	50mm~1200mm
	electric	50mm~1200mm
Surface Treatment		Epoxy polyester coating, nylon 11, baking paint

Note: This butterfly valve not only complies with ISO and GB standards, but also with standards from other countries around the world

4、 American standard D671X pneumatic soft seal butterfly valve optional materials

Main parts	material	Applicable specifications	Main parts	material	Applicable specifications
valve body	Ductile iron, gray cast iron, cast steel, stainless steel	50mm~1200mm 50mm~1200mm 50mm~300mm 50mm~300mm	valve stem	Stainless steel 410 stainless steel 316 stainless steel 304 carbon steel nickel phosphorus plating	50mm~1200mm 50mm~1200mm 50mm~1200mm 50mm~1200mm
Valve plate	Stainless steel CF8 stainless steel CF8M ductile iron nickel plated phosphorus ductile iron coated with nylon	50mm~600mm 50mm~600mm 50mm~1200mm 50mm~1200mm	valve seat	Nitrile rubber NBR Ethylene propylene rubber EPDM Fluororubber VITON Silicone rubber SEP Heat resistant EPDM Wear resistant EPDM PTFE	50mm~1200mm 50mm~1200mm 50mm~1200mm 50mm~1200mm 50mm~1200mm 50mm~1200mm 50mm~600mm

5、 Recommended medium and temperature for the sealing ring of D671X pneumatic soft seal butterfly valve

Sealing secondary material		Temperature	Type and applicability of medium													Highlight characteristics
Sealing secondary material		Temperature	freshwater	seawater	salt	alkali	weak base	strong acid	weak acid	natural gas	alcohols	air	steam	oils	food	Highlight characteristics
valve seat	Nitrile	-12ºC~82ºC	A	A	A	B	A	D	B	A	C	A	D	A	B	oil resistance
	EPDM	-35ºC~135ºC	A	A	A	A	A	C	A	B	B	A	A	C	A	aging resistance
	Corrosion resistant EPDM	-35ºC~160ºC	A	A	A	A	A	A	A	B	B	A	A	C	A	Corrosion and aging resistance
	VITON	-23ºC~135ºC	A	A	A	A	A	C	A	A	C	A	A	A	A	High temperature resistance and corrosion resistance
	PTFE	-10ºC~150ºC	A	A	A	C	A	A	A	A	A	A	A	A	A	Corrosion resistance and high temperature resistance
Disc	Ductile iron electroplating	-30ºC~350ºC	B	D	C	D	C	D	C	B	A	B	A	A	C	heat-resistant
	Ductile iron nylon coating	-30ºC~100ºC	A	A	A	A	A	D	A	A	C	A	D	A	A	Corrosion resistance and wear resistance
	Aluminum bronze	-273ºC~232ºC	A	B	C	D	C	D	B	A	A	A	A	A	C	Heat resistant and corrosion-resistant
	stainless steel	-268ºC~316ºC	A	B	C	C	B	C	A	A	A	A	A	A	A	High temperature resistance and corrosion resistance

A is very suitable B is suitable C is limited D is not suitable

6、 American standard D671X pneumatic soft seal butterfly valve connection size

Nominal Diameter		Structure length (Standard value)	External dimensions (Reference value)				Connection size (Standard value)
Nominal Diameter		Structure length (Standard value)	External dimensions (Reference value)				0.6MPa		1.0MPa		1.6MPa
mm	inch	L	H	H0	A	B	D0	n-d	D0	n-d	D0	n-d
50	2	43	63	315	180	65	110	4-14	125	4-18	125	4-18
65	21/2	46	70	330	180	65	130	4-14	145	4-18	145	4-18
80	3	46	83	390	245	72	150	4-18	160	8-18	160	8-18
100	4	52	105	431	240	72	170	4-18	180	8-18	180	8-18
125	5	56	115	455	240	72	200	8-18	210	8-18	210	8-18
150	6	56	137	626	350	93	225	8-18	240	8-22	240	8-22
200	8	60	164	720	350	93	280	8-18	295	8-22	295	12-22
250	10	68	206	800	550	350	335	12-18	350	12-22	355	12-26
300	12	78	230	860	600	350	395	12-22	400	12-22	410	12-26
350	14	78	248	883	600	350	445	12-22	460	16-22	470	16-26
400	16	102	289	972	600	350	495	16-22	515	16-26	525	16-30
450	18	114	320	1043	750	380	550	16-22	565	20-26	585	20-30
500	20	127	343	1098	750	380	600	20-22	620	20-26	650	20-33
600	24	154	413	1236	750	380	705	20-26	725	20-30	770	20-36
700	28	165	478	1431	750	380	810	24-26	840	24-30	840	24-36
800	32	190	525	1488	750	380	920	24-30	950	24-33	950	24-39
900	36	203	620	1615	1250	380	1020	24-30	1050	28-33	1050	28-39
1000	40	216	725	1765	1500	580	1120	28-30	1160	28-36	1170	28-42
1200	48	254	780	1976	1500	580	1340	32-33	1380	32-39	1390	32-48