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Description Material Performance Product Size Specifications

Product [manual flange telescopic butterfly] details：

Product Name: manual flange telescopic butterfly valve

Product features: manual flange telescopic butterfly valve, manual butterfly valve, flange expansion butterfly valve

Uses and features：

Telescopic butterfly valve suitable for temperature are less than 80, nominal pressure is less than 1.6MPa of food, medicine, chemical, petroleum, electric power, textile, papermaking, water supply and drainage, gas pipes to regulate the flow and closure of the role of media, with compensation pipeline expansion and contraction function. Its main features are:
1、Novel design, reasonable, unique structure, light weight, easy to operate, open and close fast；
2、In addition can be adjusted and the shrinkage of valve closure, temperature compensation pipeline expansion and contraction function, but also for the installation of valve replacement and maintenance convenience；
3、Sealing parts can be adjusted replacement, reliable sealing performance and other characteristics。

Part name	Material Science
valve body	Cast iron, cast steel, stainless steel, alloy steel, chromium molybdenum steel
Disc	Cast steel, alloy steel, stainless steel, chrome molybdenum steel
Seal ring	Rubber, PTFE, poly internal grease, stainless steel
The stem	2Cr13、1Cr13Stainless steel, chrome molybdenum steel
Telescopic tube	Cast iron, cast steel, stainless steel, chrome molybdenum steel
filler	Flexible graphite

Nominal diameter	DN(mm)	50~2000
Nominal pressure	PN(MPa)	0.6	1.0	1.6
Test pressure Ps(MPa)	strength test	0.9	1.5	2.4
	Seal test	0.66	1.1	1.76
	Air tight test	0.6	0.6	0.6
Applicable temperature	≤80℃
Applicable medium	Air, water, steam, gas, oil, etc.。
Driving form	Manual, worm and worm drive, gas transmission, electric drive。

Nominal diameter		Dimensions (reference values)						Flange dimensions and bolt hole dimensions (standard values)
		H	H1	Design maximum length	Design minimum length	Design length	L2	0.6MPa				1.0MPa				1.6MPa
millimeter	inch							D	D1	D2	n-d	D	D1	D2	n-d	D	D1	D2	n-d
50	2	325	240	163	138	151	265	140	110	88	4-14	165	125	99	4-18	165	125	99	4-18
65	2 1/2	340	250	188	152	170	265	160	130	108	4-14	185	145	118	4-18	185	145	118	4-18
80	3	355	255	192	162	177	320	190	150	124	4-18	200	160	132	8-18	200	160	132	8-18
100	4	400	275	215	175	205	320	210	170	144	4-18	220	180	156	8-18	220	180	156	8-18
125	5	435	300	230	185	215	340	240	200	176	8-18	250	210	184	8-18	250	210	184	8-18
150	6	455	310	240	195	225	390	265	225	199	8-18	285	240	211	8-22	285	240	211	8-22

Design standard：GT/T12238-1989
Flange connection size：GB/T9113.1-2000; GB/T9113.2-2000
　　　　　　　GB/T9115.1-2000; GB/T9115.2-2000
Pressure test：GB/T13927-1992; GB/T9092-1999

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