c. ZXN CONTROL VALVES

ZXN pneumatic diaphragm double-seated regulating valve

It has double-disc guide, and multi-spring pneumatic actuator. It is of compact configuration, light weight, motion agility, and limited loss of pressure drop, large valve capacity and exact flow characteristics. It is widely applied to the fields of petroleum, chemical plant, electric power and smelting 

Main technical parameters: 

1) nominal size: DN 20-200mm (3/4"~8″)

2) nominal pressure: PN(MPa)1.6\4.0\10.0(ASME Class:150/400/600)

3) leakage class: IV/V/VI 

4) flow characteristics: equal percentage, linear 

5) temperature range: -196~+560celsius.

Types of ZXN:

*ZXNO Standard type, the operating Temperature -20 ~ +200celsius, leakage grade II/IV .(PIC 1)

 

* ZXNG Heat dispersing type, the valve covers additional heat radiator which can be used for medium of temperature -60 ~ +450celsius occasions (PIC 2) 

 

* ZXNV The bellows type, which guarantee the sealing of the movement of the stem to form a complete seal environment, blocking external fluid leakage (PIC 3) 

 

* ZXND low temperature type, the valve using long-necked tube and bellow sealed structure which can be used for cryogenic -196celsius occasions (PIC 4) 

 

* ZXNQ regulate and cut-off valve whose soft sealing type structure up to class VI leakage standards (micro-bubble level) (PIC 5) 

 

* ZXNJ-type jacket and insulation belt with stainless steel insulation jacket for easy to crystallize after cooling fluid \ solidification caused by blockage occasions (PIC 6) 

 

Spool \ seat are made of build-up Stellite alloy, suitable for high temperature \ deep cold and other harsh conditions. 

 

Specifications and technical parameters

 

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