SO-26001、SO-26101、SO-26201 Self-operated Differential Pressure Regulator for Downstream Control
An energy-saving control valve without external energy supply, used for non-corrosive liquids and gases with a temperature of ≤ 200℃. It is a pressure differential control device at the valve outlet. When the pressure differential increases, the valve closes.
SO-26002、SO-26102、SO-26202 Self-operated Differential Pressure Regulator for Upstream Control
An energy-saving control valve without external energy sources, used for non-corrosive liquids and gases with a temperature of ≤ 200℃ and a valve-before differential pressure control device. The valve opens when the differential pressure increases.
An energy-saving control valve without external energy supply, used for non-corrosive liquids and gases with a temperature of ≤ 200℃ for differential pressure control devices. The valve opens or closes when the differential pressure increases.
Low maintenance, direct control of the medium, energy-saving control valve without external energy supply
Stainless steel bellows pressure-balancing type, with small unbalanced force and high sensitivity
Supports internal and external pressure tapping
Wide range of set points, adjustable set points can be conveniently adjusted by adjusting the nut
For high sealing requirements, use soft-sealing valve core
Standard modular design, with high levels of standardization, series, and generalization
Material: WCB、CF8、CF8M
Nominal Size: DN15~250mm
Pressure Rate: PN1.6~PN4.0MPa
Voltage Regulating Range：ZA3:0.1~0.6Mpa、0.015~0.15Mpa、0.05~0.3Mpa、0.01~0.07Mpa、0.005~0.035Mpa
ZA4:0.1~0.5Mpa、0.005~0.12Mpa、0.05~0.25Mpa、0.01~0.06Mpa、0.005~0.035 Mpa
Temperature Range: ≤200℃
Operator: Self-Pressurized
Application range: This is applicable to automatic control systems without (or where driving energy cannot be used) in industrial processes such as water supply, petrochemicals, heating and thermal supply, energy, papermaking, food, and steel production. It is particularly suitable for automatic control system devices in natural gas extraction and transportation or gas transmission.
The working principle of the three eccentric butterfly valve is based on its unique structural design, which achieves sealing and flow control functions through three eccentric distances: Structural Design: Three Eccentric Structure: The valve stem axis deviates from the center of the butterfly plate and the body center, and the rotation axis of the valve seat is at an angle to the axis of the valve body channel. This design enables the butterfly plate to form a wedge-shaped space with the valve seat when closed, achieving sealing through friction. Conical Sealing Surface: The periphery of the butterfly plate is machined into an external inclined conical surface, and the valve seat is an internal inclined conical surface, forming an elliptical contact surface. When closed, the butterfly plate achieves sealing through the asymmetric pressing force in the up and down directions, and the sealing becomes tighter as the pressure increases. Working Mechanism: Open State: The butterfly plate is separated from the valve seat, and the fluid passes through the channel; due to the eccentric design, during the opening process, the butterfly plate gradually detaches from the valve seat, reducing friction and operating torque. Closed State: The butterfly plate rotates 90° to contact the valve seat, forming a wedge-shaped space and achieving sealing through torque. Flow Regulation: During the opening rotation of the butterfly plate, the valve's flow area gradually increases, reducing fluid resistance and improving the flow coefficient, achieving flow regulation. Technical Advantages: Sealing Performance: The metal-to-metal hard sealing method can still maintain good sealing performance in high-temperature and high-pressure environments; Low Friction Operation: The eccentric design significantly reduces the operating torque and extends the valve's lifespan; Self-Locking Function: When closed, the butterfly plate becomes tighter under pressure, preventing the phenomenon of over-positioning. This valve is widely used in the petroleum, chemical, and power industries, and common structural connection forms include double flange type, welding type, lug type, and socket type, etc.
There is an oil groove between the valve body and the sealing surface of the pressure-balanced plug valve, and sealing grease can be injected into the valve seat through the oil nozzle at any time to improve the sealing performance. The material of the parts and the size of the flange can be reasonably selected according to the actual working conditions or user requirements to meet various engineering needs.
An energy-saving multi-combination control valve without external energy sources, used for flow and temperature control devices for non-corrosive liquids with a maximum temperature of 350℃, as well as pressure and differential pressure control devices, and flow and pressure control devices for liquids, gases and steam.