CHQ electric explosion-proof butterfly valveDetailed product description：

The CHQ electric explosion-proof butterfly valve is a combination of a butterfly valve and a CHQ series electric explosion-proof actuator. It can be controlled by inputting a control signal (4-20mA or 1-5VDC) and a single-phase power supply. The electric butterfly valve has strong functions, small size, lightweight and pleasant, reliable performance, simple matching, and large flow capacity. It is especially suitable for occasions where the medium is viscous, contains particles, or fibers. At present, this electric regulating butterfly valve is widely used in industrial automatic control systems in industries such as food, environmental protection, light industry, petroleum, papermaking, chemical industry, teaching and research equipment, and power.  

1、 Valve body
Nominal diameter: 50-400mm
Nominal pressure: PN1.0, 1.6, 2.5MPa
Connection form: flange connection
Material: HT200 ZG25I ZG1Cr18Ni9 ZG0Cr17Ni12Mo2 lined with PTFE
Medium temperature: Room temperature type: -20 º C~+200 º C Heat dissipation type: -40 º C~+450 º C
Applicable media: freshwater, seawater, food, natural gas, alcohols, salts, acids, alkalis, oil, steam, air, etc

2、 Optional materials for valve components

Main components	Material	Applicable specifications	Main components	Material	Applicable specifications
valve body	ductile cast iron gray cast iron cast steel stainless steel	50mm~300mm 50mm~300mm 50mm~300mm 50mm~300mm	valve stem	Stainless steel 416 Stainless Steel 316 Stainless Steel 304 Nickel phosphorus plating on carbon steel	50mm~300mm 50mm~300mm 50mm~300mm 50mm~300mm
valve plate	Stainless steel CF8 Stainless steel CF8M Ductile iron nickel phosphorus plating Ductile iron coated with nylon aluminum bronze	50mm~300mm 50mm~300mm 50mm~300mm 50mm~300mm 50mm~300mm	valve seat	Nitrile rubber NBR Ethylene propylene rubber (EPDM) Fluororubber VITON Silicone rubber SEP Heat resistant EPDM Wear resistant EPDM	50mm~300mm 50mm~300mm 50mm~300mm 50mm~300mm 50mm~300mm 50mm~300mm

CHQ electric explosion-proof butterfly valve sealing pair suitable medium, temperature recommendation table

Sealing pair material

Applicable temperature

Type and applicability of medium

Highlight characteristics

light water

sea water

salt Class

strong alkali

weak alkali

strong Sour

weak Sour

Sky but qi

alcohol Class

Empty qi

steam steam

oil Class

eat product

valve seat

Nitrile

-12ºC~82ºC

A

A

A

B

A

D

B

A

C

A

D

A

B

oil-resistant

EPDM (Ethylene Propylene Diene Monomer)

-35ºC~135ºC

A

A

A

A

A

C

A

B

B

A

A

C

A

Aging-resistant

Corrosion resistant EPDM

-35ºC~160ºC

A

A

A

A

A

A

A

B

B

A

A

C

A

Corrosion and aging resistance

fluororubber

-23ºC~135ºC

A

A

A

C

A

C

A

A

C

A

A

A

A

High temperature resistance and corrosion resistance

Polytetrafluoroethylene

-10ºC~150ºC

A

A

A

A

A

A

A

A

A

A

A

A

A

Corrosion resistance and high temperature resistance

butterfly valve 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, wear resistance, and friction reduction

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

3、 Installation size (unit: mm) (dashed line represents analog control box, switch type does not have this size)

path	Ｌ	L１	H1	H2	D1	D2	D	Remark
fifty	two hundred and sixteen	one hundred and ninety	seventy	four hundred and twelve	ninety-two	one hundred and twenty-five	eighteen	CHQ05
sixty-five	two hundred and sixteen	one hundred and ninety	seventy-six	four hundred and twenty-five	one hundred and six	one hundred and forty-five	eighteen	CHQ05
eighty	two hundred and sixteen	one hundred and ninety	eighty-nine	four hundred and thirty-seven	one hundred and twenty-two	one hundred and sixty	eighteen	CHQ08
one hundred	two hundred and sixteen	one hundred and ninety	one hundred and four	four hundred and fifty-two	one hundred and fifty	one hundred and eighty	eighteen	CHQ10
one hundred and twenty-five	two hundred and seventy-nine	two hundred and twenty-one	one hundred and twenty	five hundred and four	one hundred and seventy-seven	two hundred and ten	eighteen	CHQ15
one hundred and fifty	two hundred and seventy-six	two hundred and twenty-one	one hundred and thirty-two	five hundred and twenty-four	two hundred and four	two hundred and forty	twenty-three	CHQ20
two hundred	two hundred and seventy-six	two hundred and twenty-two	one hundred and sixty-seven	six hundred and seven	two hundred and sixty	two hundred and ninety-five	twenty-three	CHQ50
two hundred and fifty	two hundred and seventy-six	two hundred and forty	two hundred and two	six hundred and eighty-six	three hundred and fourteen	350/355	23/26	CHQ60
three hundred	two hundred and seventy-six	two hundred and forty	two hundred and thirty-nine	seven hundred and fourteen	three hundred and seventy	400/410	23/26	CHQ80
three hundred and fifty	two hundred and seventy-six	two hundred and forty	two hundred and sixty-five	seven hundred and forty-nine	four hundred and twenty-two	460/470	23/26	CHQ120
four hundred	two hundred and seventy-six	two hundred and forty	two hundred and ninety-seven	seven hundred and eighty-one	four hundred and seventy-three	515/525	26/30	CHQ200