V230Y21/22 self-operated micro-pressure regulating valve is an energy-saving control valve that realizes precise automatic adjustment of extremely small pressures by utilizing the energy of the regulated medium itself without external energy sources. The core of the valve is equipped with a large-area pressure-sensing actuator. Through a pressure-tapping pipe, the weak upstream or downstream pressure signal is introduced into the pressure-sensing diaphragm chamber. This allows the medium pressure to generate a sensitive thrust on the huge diaphragm and form a sensitive dynamic force balance with the high-precision preset spring force. The actuator drives the valve stem in precise displacement according to pressure deviations on the millibar (mbar) scale, changing the flow area between the valve plug and seat to achieve accurate compensation of fluid pressure. It is divided into the nitrogen-supply reducing type (Y21, normally open) for controlling downstream pressure and the nitrogen-venting relief type (Y22, normally closed) for controlling upstream pressure. It typically adopts a soft-seal structure design to ensure bubble-tight sealing integrity and extremely high adjustment sensitivity under ultra-low pressure conditions. V230Y21/22 series micro-pressure regulating valves feature high sensitivity, excellent low-pressure stabilization performance, simple structure, and intrinsic explosion-proof safety. They are widely used in petrochemical tank blanketing systems, industrial kiln gas ratio control, and various precision gas-phase micro-pressure balance systems in the semiconductor and pharmaceutical fields.

Product Image of V230Y21/22 Self-operated Micro-pressure Regulating Valve

1. Energy-saving self-operated drive:Requires no electricity or air supply. It directly utilizes the pressure energy of the regulated medium (such as nitrogen, air, natural gas, etc.) to drive the actuator, which is energy-saving and significantly reduces the cost of automated piping.
2.Dual micro-pressure control logic:Available in Y21 (downstream supply type, e.g., nitrogen supply valve) and Y22 (upstream venting type, e.g., nitrogen vent valve) forms to flexibly construct tank blanketing systems or other micro-pressure balance conditions.
3.Precision pressure-balanced structure:The valve plug adopts a pressure-balanced design (such as balanced bellows or piston structure), which effectively eliminates the influence of high pressure differential on adjustment accuracy, ensuring stable outlet micro-pressure even when inlet pressure fluctuations are large.
4.Millibar-scale sensitive pressure sensing:The core actuator is equipped with an ultra-large area high-quality pressure-sensing diaphragm, which can accurately sense minute pressure changes as low as millibar (mbar) levels, offering extremely fast dynamic response suitable for precise control under ultra-low pressure.
5.Precise and convenient micro-pressure setting:The valve is equipped with a high-sensitivity adjustment spring, allowing users to easily set target pressure values within a very small range (e.g., 0.5KPa to several KPa) through a fine-tuning nut. Field commissioning is intuitive and efficient.
6.Bubble-tight sealing integrity:The valve plug and seat mostly adopt a soft-seal structure design and undergo precision machining to ensure bubble-level sealing performance during ultra-low pressure shut-off, effectively preventing the leakage and waste of valuable process gases.
7.Intrinsic explosion-proof safety:The adjustment process relies entirely on mechanical physical actions without any electrical signals involved. It possesses inherent safety attributes, particularly suitable for flammable, explosive, and harsh environments such as petrochemical plants and oil storage tanks.
8.Modular maintenance and long-term operation:The overall structure is compact with a scientific connection between the actuator and valve body. Key wearing parts like diaphragms and seals adopt a modular design, allowing replacement and maintenance without complex tools, significantly shortening system downtime.

Structural Drawing of V230Y21/22 Self-operated Micro-pressure Regulating Valve

List of Component Names and Materials

Performance Specification Sheet

Standard requirements for external dimensions

1. The structural length of the valve shall comply with the standard of GB/T12221

2. Connecting flanges according to GB/T17241.6 standard

Outline dimension table(Unit: mm)

Due to the rapid R&D iteration speed of valve products from China Kaivex Valve Group Co., Ltd., the above technical parameters and specification documents, including product overview, features, parts materials, outline dimension charts, CAD drawings, and product instruction manuals, are for your reference only. For actual applications, please contact our valve sales engineers to obtain the support you need for free. Thank you!