Overview of ZXQ (ZSQ) Pneumatic Cut off Valve

The ZXQ (ZSQ) pneumatic diaphragm (piston) 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, temperature or liquid level. Widely used in automatic and remote control systems for production processes in various industrial sectors such as petroleum, chemical, metallurgical, power, light industry, textile, etc.

This series of products comes in two types: film 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 64; The nominal caliber range is DN20-200mm. Suitable for fluid temperatures ranging from -60 ℃ to 450 ℃. The leakage level is IV or VI. The traffic characteristic is fast opening.

Characteristics of ZXQ (ZSQ) Pneumatic Cut off Valve

﹡The cut-off valve adopts a multi spring actuator and is connected to the regulating mechanism with three columns, which can reduce the overall height by about 30% and the weight by about 30%.
﹡The valve body is designed according to the principles of fluid mechanics as a low flow resistance channel with equal cross-section, increasing the rated flow coefficient by 30%.
﹡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.
﹡The balanced valve internals increase the allowable pressure difference of the shut-off valve.
﹡The bellows seal forms a complete seal for the moving valve stem, blocking the possibility of medium leakage.
﹡Piston type actuator, with high operating force and large pressure difference.

Main component materials of ZXQ (ZSQ) pneumatic cut-off valve

Main technical parameters and performance indicators of ZXQ (ZSQ) pneumatic cut-off valve

1) The performance indicators of this product comply with the GB/T4213-92 standard;
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 allowed values in the table are for using standard cylinder values. Different cylinders can be used to increase the allowable pressure difference.

Selection of valve body and core materials for ZXQ (ZSQ) pneumatic cut-off valve

Soft valve seat type working temperature and maximum pressure difference range. Stellite alloy welded valve seat working temperature and common pressure difference range

■ Dimensions and weight of ZXQ (ZSQ) pneumatic cut-off valve

ZXQ (ZSQ) Pneumatic Cut off Valve Dimensions and Weight Table(Unit: mm)

ZXQ (ZSQ) Pneumatic Cut off Valve Connection Dimensions and Standards

·Flange standard: Cast iron flange according to GB4216-84
Cast steel flanges shall comply with GB9113-88 JB/T79-94
·Flange sealing surface type: PN10 and PN16 are convex surfaces;
PN40 and PN64 are concave convex surfaces, and the valve body is concave.
·Structural length: According to GB12221-89 standard
·Execution mechanism gas signal interface: internal thread M10 × 1
﹡The distance between the valve body flange and the flange end face can be manufactured according to the standard specified by the user. For example, ANSI, JIS, DIN and other standards.

■ ZXQ (ZSQ) Pneumatic Cut off Valve Ordering Notice

Please provide the following information when placing an order:
·Media name
·Name and model of regulating valve
·Working temperature and range
·Nominal diameter (mm)
·Operation mode of the whole machine
·Nominal pressure (MPa)
·Valve body, valve internals, and packing materials
·Rated flow coefficient (Kv)
·Attached attachments

ZMQ, ZSQ pneumatic diaphragm, piston type cut-off valve models