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Pressure valve (manual+dual pressure selection) YQRF-15/32-1

The pressure -limiting valve (overflow valve) is a hydraulic pressure control valve in hydraulic equipment in hydraulic equipment.

Key:

Coaxial valve, pneumatic booster pump

Product Description

| Product introduction

  • Pressure limiting valve (relief valve) is a kind of hydraulic pressure control valve in hydraulic equipment mainly plays a role in safety protection, system unloading and pressure stabilization
    1, safety protection role: a protection when the pump starts: when the pump starts to start, the pressure limiting valve spool is fully opened, the pump starts without load, preventing overload of the pump and motor.b When the system works normally:
    when the system pressure exceeds the set pressure, the valve core opens, and overflows, Make the system pressure no longer increase (usually make the set pressure of the pressure limiting valve 10% ~ 20% higher than the maximum working pressure of the system), overload protection
    2, system unloading effect: when the tool and workpiece do not need cooling and lubrication, the pilot valve no air pressure passes, the valve core opens, port B through the water tank, at this time the pump unloads, the pressure limiting valve is used as an unloading valve.
    3. Pressure stabilization: the pressure limiting valve is connected in parallel on the waterway, and the pressure limiting valve generates back pressure to provide a stable pressure to the system.

    Advantages:
    1. Applicable medium: liquid, high viscosity, high pollution;
    2. Solid structure, not easy to pollute;
    3. Separation of control parts and media;
    4. It is more convenient and accurate to change the pressure;
    5. No pressure impact in the pipeline;
    6. The control pressure range is wider;
    7. When the control air pressure is zero, the system realizes low-pressure circulation, energy saving and noise reduction; At the same time, it plays the dual role of relief valve and unloading valve.


    Manual pressure limiting valve use method
    (1) Manual pressure limiting valve YQRF and hydraulic pump do not work when the pressure gauge is displayed as zero (1) When the hydraulic pump is started and the control air source pressure of valve 1 is zero
    , the system enters the low pressure operation mode, and the pressure gauge displays a lower pressure value.
    (2) The control air supply pressure of the manual regulating valve 1 increases it, and the system pressure also increases proportionally until the working pressure is reached.
    (1) The system pressure has been kept constant
    during the working phase (1) After the work is completed, the control air pressure of the manual adjustment valve <> is made to zero, and the system enters the low-pressure operation mode again and waits for the next working phase.

    How to use the proportional pressure limiting valve (<>) The pressure gauge shows zero when the proportional pressure limiting valve YQRF-<> and the hydraulic pump are not working
    (<>) When the hydraulic pump is started and the control air source pressure of valve <> is zero
    , the system enters the low pressure operation mode, and the pressure gauge shows a lower pressure value.
    (<>) The control air supply pressure of the electrical signal regulating valve <> increases it, and the system pressure also increases proportionally until the working pressure is reached.
    (<>) The system pressure is kept constant during the working phase.
    (<>) After the work is completed, the control air source pressure through the electrical signal regulating valve <> makes it zero, and the system enters the low-pressure operation mode again and waits for the next working stage.

 

| Technical parameters

This specification function Pressure limits
connect  1", 1½"
Interface form G, Rc, NPT
Path DN15、DN32
Pressure range 0.5~12MPa
function Manual continuous pressure adjustment, automatic continuous pressure adjustment
Body material Stainless steel, carbon steel surface galvanized
Valve seat Metal to metal
Sealing material HPU, NBR, FKM, EPDM, PEEK
vacuum <10-7Pa▪L/s
medium Liquid, gel-like, granular, highly fouling, corrosive
Flow P→T (see sample legend for details)
Operation time <1000ms
Media temperature -10~60 °C (conventional), up to 230 °C
Ambient temperature -10~50℃
authentication CE, ISO9001
Electrical specifications Rated voltage 24VDC, special voltages are available upon request
Degree of protection IP65
connect DIN type plug, M12 4-pin plug, special connection available on request
Proportional adjustment signal 4-20mA, 0-10V, 1-5V
Gas drive specifications Control mode Manual, proportional electromagnetic, manual + double pressure selection
temperature -10~50°C (no condensation)
Drive pressure See the sample legend for details
lubrication No lubrication required

Note: For special requests, please contact your local office

 

 | Product application

  • Machine tool lubrication and cooling, automotive industry, environmental technology

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