ZMQ Pneumatic Thin Film Cut off ValveDetailed product description：

The ZMQ cut-off valve adopts a top guide structure and is equipped with a multi spring actuator. It has the advantages of compact structure, light weight, sensitive action, S-shaped fluid channel, low pressure drop loss, large valve capacity, and easy disassembly and assembly. The cut-off valve receives signals from the regulating instrument to cut off, open, or change the flow direction of the medium, achieving automatic control of process parameters such as pressure, flow rate, and liquid level. ZMQ type pneumatic thin film cut-off valve is widely used in the automatic control and transportation control systems of various industrial sectors such as petroleum, chemical, metallurgical, power, light industry, textile, etc. There are two types of ZMQ cut-off valves in this series: diaphragm type and piston type. There are three types of valve body structures: single seat, sleeve, and double seat (two position three-way). The sealing forms include packing sealing and corrugated pipe sealing. The nominal pressure rating of the product is PN10, 16, 40, and 46, and the nominal diameter range is DN20-200mm. The applicable fluid temperature ranges from -60 to 450 ℃. The leakage level is IV or VI. The traffic characteristic is fast opening.

ZMQ Pneumatic Thin Film Cut off Valve Product Features:
1. The cut-off valve adopts a multi spring actuator and a regulating mechanism connected by three vertical poles, which can reduce the overall height by about 30% and the weight by about 30%.
2. The valve body is designed according to the principles of fluid mechanics as a low flow resistance channel with equal cross-section, increasing the number of rated flow systems by 30%.
3. There are two types of sealing parts for valve internals: tight type and soft type. The tight type is made of hard alloy welding, while the soft type is made of soft material and has excellent sealing performance when closed.
4. The balanced valve internals increase the allowable pressure difference of the shut-off valve.
5. The bellows sealing type forms a complete seal for the moving valve stem, blocking the possibility of medium leakage.
6. Piston type actuator, with high operating force and large pressure difference.

Main component materials of ZMQ pneumatic thin film cut-off valve:

Valve body, sealing sleeve	Valve core and seat	Sleeve, valve plug	filler	Ripple membrane	spring	Valve core, valve plug (soft parts)	Valve stem, push rod	bellows
HT200、ZG230-450、ZG1Cr18Ni9Ti、ZG1Cr18Ni12MO2Ti	1Cr18Ni9T, OCr18Ni12MO2Ti, 1Cr18Ni9Ti welded with Stellite alloy	1Cr18Ni9T, OCr18Ni12MO2Ti, 1Cr18Ni9Ti welded with Stellite alloy	Polytetrafluoroethylene, flexible graphite	Dingqing rubber clip reinforced polyester fabric	60Si2Mn	Enhanced polytetrafluoroethylene	2Cr13、1Cr18Ni9Ti	1Cr18Ni9Ti

Technical parameters of ZMQ pneumatic thin film cut-off valve:

Nominal diameter DN (mm)

fifteen

twenty

twenty-five

thirty-two

forty

fifty

sixty-five

eighty

one hundred

one hundred and twenty-five

one hundred and fifty

two hundred

Rated flow coefficient (KV)

Single seat, double seat

five

seven

eleven

twenty

thirty

forty-eight

seventy-five

one hundred and twenty

one hundred and ninety

three hundred

four hundred and eighty

seven hundred and sixty

sleeve

eleven

twenty

thirty

forty-eight

seventy-five

one hundred and twenty

one hundred and eighty

three hundred

four hundred and eighty

seven hundred and sixty

Nominal diameter (MPa)

1.0 1.6 4.0 6.4

Rated stroke (mm)

eight

twelve

twenty

twenty-five

forty

fifty

Effective area (C ㎡)

ZMQ type

one hundred

two hundred

four hundred

six hundred

one thousand

ZSQ type

one hundred

one hundred and twenty-five

one hundred and sixty

two hundred and fifty

Allowable leakage amount

Hard seal 1/h

Generally: 10-4 times the rated capacity of the valve; Tight type: single and double seat: 1.2 × 10 ᯝ 7, sleeve 5 × 10 ᯝ 6 × valve customer fixed capacity

soft seal

Grade VI

Allowable pressure difference （ MPa）

PZMQ positive effect N

six point four

five point zero nine

two point nine one

one point eight five

two point one eight

one point three three

one point five two

zero point nine nine

zero point six two

zero point six zero

zero point six nine

zero point three nine

PZMQ Reaction N

six point four

six point four

three point eight eight

two point four seven

zero point nine one

one point seven seven

two point zero three

one point three two

zero point eight three

zero point eight zero

zero point nine two

zero point five two

P ZSQ N

six point four

six point one

three point five

two point three

three

one point nine

one point nine

one point five

zero point nine three

zero point eight four

zero point six five

zero point four seven

M ZQM S

Nominal Pressure

ZMQ

0 or 250

ZQM

0 or 400-600

Note: 1) The performance and indicators of ZMQ cut-off valve shall comply with GB/T4213-92; 2) If the allowable pressure difference in the table is greater than the nominal pressure, the nominal pressure value shall be taken, and if it is less than or equal to the nominal pressure value, it shall remain unchanged; 3) The allowable values in the table are based on standard cylinder values, and different cylinders can be used to increase the allowable pressure difference.

ZMQ pneumatic diaphragm cut-off valve connection standard:

Flange Standard	Cast iron flange according to BG4216-84; Cast steel flange according to BG9113-88, JB/T79-94
Flange sealing surface type	PN10 and PN16 are convex surfaces; PN40 PN64 is a concave convex surface, and the valve body is a concave surface
Execution mechanism gas signal interface	Internal thread M16 × 1
structural length	BG12221-98

Note: The valve body flange and flange end face distance can be manufactured according to user specified standards, such as ANSI JIS JPI and other standards.