Product

Self operated single seat regulating valve

Brand：Pneumatic eccentric butterfly valve 型号：ZZY

自力式单座调节阀 is an automatic regulating valve that does not require external power and is driven by the pressure of the medium itself, suitable for pressure control of gas, liquid, and steam media. The following is its core information:
1、 Structural characteristics
Single seat design
Adopting a single valve core and seat structure, the flow channel is simple and the seal is reliable, but the balance force is large, and the pressure before and after the valve needs to be balanced through a corrugated pipe.
Pressure collection method
Rear valve type (ZZYP-B): maintains stable downstream pressure and is suitable for pressure reduction conditions.
Front valve type (ZZYP-K): controls upstream pressure and is suitable for pressure relief and stabilization scenarios.
2、 Technical parameters
Nominal diameter: DN15-DN300
Pressure rating: PN16-PN40
Temperature range: -20 ℃ to+350 ℃ (expandable to+550 ℃ with condenser)
Control accuracy: Error ≤ 5%, using fast opening flow characteristics.
3、 Installation points
High temperature medium: It needs to be installed upside down and equipped with a condensing tank to prevent the actuator from being damaged by heat.
Steam system: A condenser protective sealing element needs to be installed in front of the valve connection.
4、 Application Fields
Petrochemical Industry: Pipeline Pressure Stability Control
Electric Metallurgy: High Temperature Steam/Thermal Oil Regulation
Urban heating: constant pressure control in environments without electricity or gas.

Instructions for Use
ZZY type self operated pressure regulating valve (ZZY self operated regulating valve) does not require external energy. It uses the energy of the regulated medium as a power source to introduce the control valve core position into the actuator, and changes the pressure difference and flow rate at both ends to stabilize the pressure before (or after) the valve. It has the advantages of sensitive action, good sealing, and small pressure setting point wave power, and is widely used in automatic control of pressure reduction and stabilization or release and stabilization of gas, liquid, and steam media.
This product has three structures: single seat (ZZYP), sleeve (ZZYM), double seat (ZZYN), and three types of structures; There are two types of actuators: membrane type and piston type; The types of action include pressure regulation after the pressure reducing valve (Type B) and pressure regulation before the pressure relief valve (Type K). The nominal pressure rating of the product includes PN16, 40, and 64; Valve body diameter range DN20-300; There are three levels of leakage: Level II, Level IV, and Level VI; The traffic characteristic is fast opening; The pressure is adjusted in stages from 15 to 2500Kpa. Can be combined as needed to meet user operating requirements.