Wafer Type Butterfly Check Valve

Model:	H77X
Brand:	TVT
Origin:	Made In China
Category:	Industrial Supplies / Machine Hardware / Valves
Label:	check valve , valve , dual disc valve
Price:	-
Min. Order:	1 pc

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Product Description

Wafer Type Butterfly Check Valve

Model No.: H77X

Nomianl Diameter: 50-800mm

Nominal Pressure: PN10/16 Class125/150LB

Features:

1. The other name of Butterfly check valve is wafer type check valve. It is energy-saving product.

2. It is small in size, light in weight and of compact structure and easy maintenance. The disc is dual-type and can close by itself quickly under the action of spring torque, avoiding back flow and water hammer. It is good at avoiding back flow, also some other features, such as small resistance coefficient, zero leakage when water pressure testing, complete sealing, vertical and horizontal installation.

3. Long service life, excellent sealing property and no need of frequent maintenance.

4. The flow behavior of check valve s is 3 times of globe valve and 75% of gate valve. It can cut off and regulate the media in pipeline and it is multi-function compared to gate valve and globe valve. The various selection of trim and seat materials brings wide application of check valve in chemical industry.

5. Butterfly check valve is small in size, for example, for 10” check valve, it is 1/9 weight and 1/6 volume of gate valve, so easy installation and system cost saving. Compared to hard seal gate valve and globe valve, the soft seal check valve can achieve complete sealing. It is easy to operate the check valve. The valve can be opened and closed in 90°rotary range. For the same size, the price of check valve is 30-40% of gate valve and lower installation fee for check valve. Correctly installed check valve is of some self-cleaning functions, so not easy to lose efficacy caused by impurity in pipeline.

Standard:

Design & Manufacture	Face to Face	Flange Connection	Test & Inspection
MSS SP-67 API609 EN593	API609 ISO5752 series 20 BS5155	DIN PN10/16/25 ANSI B 16.1 BS4504 ISO PN10/16 JIS B 2212/2213 BS 10 table D BS 10 table E	API 598

Performance:

size		DN40~DN800	DN40~DN600
PN		1.0MPa	1.6MPa
Test pressure	shell	1.1MPa	1.76MPa
Test pressure	sealing	1.5MPa	2.4MPa
Applicable temperature		1-EPDM	-30℃~+110℃
		2-neoprene	-7℃~+93℃
		3-NBR	-12℃~+82℃
		4-viton	+10℃~+150℃
Applicable medium		Fresh water, sea water, air, vapor, food, medicine, oil, acid, alkali, salt, etc.

Materials list

body	disc	stem	bushing	Seat working temperature
CI	Nickel coated DI	416SS	Lubricating bronze	rubber	-20℃-+85℃
DI	WCB	431SS	PTFE	Hypalon	-18℃-+135℃
WCB	ALB-bronze	316SS	SS+PTFE	EPDM	-30℃-+110℃
ALB-bronze	SS			Neoprene	-7℃-+93℃
SS				NBR	-12℃-+82℃
				Wear-resistant Rubber	-10℃-+50℃
				Viton	-23℃-+150℃
				Heat-resistant Rubber	-20℃-+150℃
				PTFE	+10℃-+150℃