Imported self-operated pressure regulating valve (pressure after control valve)
The American YLOK imported self-operated pressure regulating valve (pressure control after the valve) is composed of a control valve, an actuator and a spring for setting the pressure. It is suitable for non-corrosive liquids, gases and steams. It plays a role of pressure control after the valve in the system pipeline. When the pressure behind the valve increases, the control valve is closed.
Parameter description of pressure control valve after imported self-operated valve:
Trim features:
 1. Built-in bellows, with pressure balance structure, high sensitivity
 2. Compact structure, reliable performance, maintenance-free
 3. Adopt standard modular design
 4. Multiple combinations can be controlled through assembly
Body type: straight-through
Bonnet form: standard type, heat dissipation type
Flow characteristics: quick opening
Caliber range: DN15-300 (1/2”-12”)
Pressure rating: PN1.6, 4.0Mpa (ANSI 150, 300LB)
Leakage level: ASME B16.104 Ⅴ (soft seal). ASME B16.104 Ⅳ (hard seal)
Pipe connection method: flange type
Setting value deviation: ±5%
Applicable temperature range: -30° ～ 350°
Actuator type: Membrane actuator (self-operated). Piston type actuator (self-operated)
Working principle of pressure regulating valve after imported self-operated valve:
The pressure P1 before the valve of the process medium passes through the throttling of the valve core and the valve seat, and becomes the pressure after the valve P2. P2 is input into the lower diaphragm chamber of the actuator through the pressure guiding tube and acts on the top plate. The resulting force and spring The reaction of the valve is horizontal, which determines the relative position of the valve core and valve seat, and controls the pressure after the valve. After the valve, the force of the pressure P2 acting on the top plate also increases. At this time, the force of the top plate is greater than the reaction force of the spring, so that the valve core is closed to the position of the valve seat until the force of the top plate is balanced with the reaction force of the spring. At this time, the flow area between the valve core and the valve seat is reduced, and the flow resistance becomes larger, so that P2 is reduced to the set value. In the same way, when the pressure P2 after the valve decreases, the direction of action is opposite to the above, which is the working principle of the pressure adjustment after the valve.
When you need to change the setting value of the pressure P2 after the valve, you can adjust the adjusting nut

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Continuously improving the quality of services and keeping improving, "sincere service" is the eternal theme of KUNAG. Kunag strictly complies with the requirements of ISO9001-2000 quality system certification, strictly controls the quality and responsibilities to the people to ensure the healthy operation of production, sales and service. To strengthen communication with customers and to provide our customers with quality products and perfect service, we hereby make the following commitments:
Product Standards
Products are designed, manufactured, and inspected strictly in accordance with China\'s GB, HG standards, and US API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
pre-sale service
Product introduction, technical communication, non-standard product design, troubleshooting.
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For special or complex products, our factory arranges technicians to train and guide users on product use, troubleshooting, tuning and maintenance.
After sales service
The warranty period of Weitong products is 12 months from the factory, and the "three guarantees" service (return, replacement, repair) is implemented.
During the use of our products, our factory regularly organizes technical and inspection personnel to visit and solicit user feedback on product quality, use conditions, and improvement opinions in order to further improve product quality.
Quickly respond to customer complaints about product quality problems, and after-sales service personnel rushed to the scene within 24-36 hours (48 hours outside the province).
For after-sales service, users are required to fill in the quality feedback form after the service and make appraisal opinions, while improving Guardian\'s service quality.

Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)

QQ: 2030185432

Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.

Contact: Peng gong
Q Q: 2030185432
Mobile: 18918462396(WeChat same number - 24 hours service)
Landline: 021-59718851
E-mail :kunage@126.com