Large caliber self operated micro pressure regulating valve production

CFSPLarge caliber self operated micro pressure regulating valveProduct Description

The self operated micro pressure regulating valve adopts a large diaphragm actuator with large and stable output force, extremely sensitive to small changes in pressure and flow rate, and has high control accuracy. The valve core adopts a single seat flow opening (high inlet and low outlet) design, and a balance diaphragm is installed at the valve cover (connected to the valve body) to balance the pressure before the valve and eliminate unbalanced force. The pressure after the valve enters the diaphragm actuator through the pressure tapping tube. Compared with the diaphragm actuator regulating spring, if the pressure does not reach the set value (regulating the compression actuator spring), the pressure after the valve will increase, and vice versa, it will decrease This utility model relates to a self operated pressure regulating valve, in particular to a self operated micro pressure regulating valve that does not require external energy and only uses the pressure changes of the regulated medium itself for micro pressure regulation.

Background technology:

Self operated pressure regulating valve is an energy-saving regulating valve product that does not require external energy and only uses the pressure changes of the regulated medium itself for pressure regulation. The existing self operated pressure regulating valve needs to control a valve front pressure greater than Kpa in order to implement effective and sensitive pressure regulation. It is necessary to make significant improvements to the structure of existing self operated pressure regulating valves and provide a micro pressure regulating valve suitable for regulating and controlling pressures less than or equal to Kpa. This valve should be suitable for automatic regulation and control of various industrial furnace fuel systems, petroleum products in progress, oil storage tank storage protection gas, heat treatment protection gas, and other pipeline systems to ensure safe system operation.

Self operated micro pressure regulating valve is an energy-saving product that does not require external energy. It compares the pressure changes of the medium in the process pipeline with the signal to balance the force of the regulated medium with the output force of the actuator, in order to achieve stable pressure and differential pressure values. ZZCP-1 differential pressure valve adopts a balanced single seat valve, which has stable pressure, high accuracy, and good sealing performance, and is used to control small differential pressure. The ZZCN-10 differential pressure valve adopts a double seat valve with a large flow coefficient. By reversing the valve core, it can form two different types of products. This product is suitable for controlling the mixed flow rate of two fuel gases in various industrial furnace combustion systems or for use in the sealing oil system of hydrogen cooled generator sets. At the same time, it can also be used for automatic control of pressure reduction, stabilization, or release of various industrial gases.

Product characteristics of self operated micro pressure regulating valve

1. The adjustment spring is designed above the thin film actuator for on-site debugging.

2. No packing, there is no friction when the valve stem moves up and down, and the upper seal is reliable

3. The sensitive components of the actuator are extremely sensitive, and even tiny pressure changes can be detected

4. The valve body is in a four-way form, so K and B types can be used interchangeably

5. Balanced structure, not affected by valve front pressure

Parameter description:

Characteristics of valve internals: 1. Equipped with a single seat balance structure (double seat balance structure), high sensitivity

2. Compact structure, reliable performance, maintenance free

3. Adopting standard modular design

Valve body type: straight through type

Valve cover form: standard type

Traffic characteristics: fast opening

Caliber range: DN15-300 (1/2 "-12")

Pressure rating: PN1.6 (ANSI 150LB)

Leakage level: ASME B16.104 VI (soft seal)

ASME B16.104 IV (Hard Seal)

Pipeline connection methods: flange type, welded type, threaded type

Set value deviation: ± 8%

Applicable temperature range: -20 ℃ to 80 ℃

Type of actuator: Thin film actuator (self operated)

CFSPLarge caliber self operated micro pressure regulating valveMain technical parameters

3、 Main component materials

4、 Main performance indicators

Main technical parameters and indicators

Note: The number of bubbles in eq \ \ o \ ac (○, 1) 1 is detailed in GB/T4213-92

Table 2

Note: The weight in the table is for ZZVP type PN1 without accessories.

The self operated micro pressure regulating valve does not require external energy and uses the energy of the controlled medium itself as a power source. Introducing an actuator to control the position of the valve core to change the flow area and flow rate, thereby stabilizing the pressure behind the valve to a given value, has the characteristics of sensitive action, high control accuracy, and energy conservation.

mode of action

Pressure closed type (Type B)

The pressure regulating valve that controls the pressure behind the valve has its initial valve core in the open position. As the set point pressure increases, the valve opening gradually decreases until the pressure behind the valve stabilizes at the required set value.

Press open type (K-type)

The pressure regulating valve that controls the pressure in front of the valve has its valve core in the closed position at the initial position. As the set point pressure gradually increases, the valve gradually opens until the required set value for stable pressure in front of the valve is reached.

Differential pressure type (C type)

A regulating valve that maintains a constant pressure difference between two points, commonly used to control the ratio of two materials or to maintain a constant pressure difference between two points.

The self operated micro pressure regulating valve is a type B pressure regulating valve for pressure reduction, which can be adjusted in sections from 30mmH2O to 0.1MPa. It is widely used for automatic control of pressure reduction and stabilization or release and stabilization of various micro pressure gases, such as ignition pressure control of industrial combustion furnaces and control of other micro pressure gases. It is an energy-saving product that does not require external energy. By comparing the pressure changes of the medium in the process pipeline with the signal, the force of the regulated medium is balanced with the output force of the actuator to achieve stable pressure and differential pressure values.

ZZCP-1 differential pressure valve adopts a balanced single seat valve, which has stable pressure, high accuracy, and good sealing performance, and is used to control small differential pressure. The ZZCN-10 differential pressure valve adopts a double seat valve with a large flow coefficient. By reversing the valve core, it can form two different types of products. The self operated micro pressure regulating valve is suitable for controlling the mixed flow rate of two fuel gases in various industrial furnace combustion systems or for use in the sealing oil system of hydrogen cooled generator sets. At the same time, it can also be used for automatic control of pressure reduction, stabilization, or release of various industrial gases. The self operated micro pressure regulating valve adopts a balanced single seat valve, which can adjust the set value arbitrarily during operation. Therefore, it is suitable for micro pressure automatic adjustment of various industrial furnace combustion system fuel gases, petroleum products in process, or oil storage tank protection gases and heat treatment protection gases.

Installation precautions

The ZZVP type self operated micro pressure regulating valve utilizes the pressure of the medium itself to operate the actuator, filling the actuator with the medium. Therefore, a reasonable installation method will improve the adjustment accuracy of the set point and increase the service life of the valve.

The position of the pressure point during installation should be at an appropriate distance from the regulating valve, which should be greater than 6-10 times the diameter of the pipeline. The minimum value is detailed in Table 2.

Suggest installing a bypass for regular maintenance.

Connection size and standard

Connection method: flange, thread, welding (user required)

Flange standard: GB/T9113.1

Flange specification: PN16 steel flange

Sealing surface type: protruding surface (RF)

Flange end distance: GB12221-89

Execution mechanism interface: Internal thread M16 × 1.5 Rc1/4

*The connection method, valve body flange, and flange end face distance can be manufactured according to the user's standards.

For example: ANSI, HG, JIS, etc.

Ordering Notice:

1、 ① Product name and model ② Caliber ③ Is there any accessory for us to correctly select for you ④ Operating pressure ⑤ Temperature of the medium used.
2、 If the company's model has already been selected by the design unit, please order directly from our sales department according to the model.

3、 When the usage situation is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our valve company experts will review and control them for you. If you have any questions: Please: We will do our best to provide you with high-quality service. We provide comprehensive and professional "valve system solutions" and are also willing to help users solve problems encountered in production.