WVR-02
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A large-capacity pressure reducing valve used for the main water supply line for air conditioning, sanitary equipment, and field irrigation. Since the pilot valve uses a pressure balance mechanism, the pressure on the secondary side can be adjusted to a constant level without being affected by fluctuations in the pressure on the primary side.
For fire extinguishing equipment, please use WVR-02T, 05T type or RD-51T type, which are certified by the Fire Equipment and Safety Center of Japan. See pages 81 and 82)
Where to use
Building equipmentFactory equipmentUpland irrigation

Major features

  • Stable operation can be easily obtained by adjusting the sensitivity by adjusting the needle valve opening according to the usage conditions.
  • The basic valve and pilot valve can be easily disassembled for easy adjustment, repair and parts replacement.
  • The lift limiting mechanism can limit the overflow.

specification

Product code WVR02-B □The symbol of the secondary adjustment pressure range is entered in □. WVR02-L □The symbol of the secondary adjustment pressure range is entered in □.
Valve type Pressure reducing valve Pressure reducing valve
Use Goods Goods
Nominal diameter 50-400 (2-16) 40-200 (1 1/2-8)
Applicable fluid Water / hot waterWhen using it for a water supply device, please use WVR-02N type, WVR-02PN type, WVR-02CN type, which are compliant with the performance standards of the Waterworks Law. Water / hot waterWhen using it for a water supply device, please use WVR-02N type, WVR-02PN type, WVR-02CN type, which are compliant with the performance standards of the Waterworks Law.
Fluid temperature 5-60 ℃ 5-60 ℃
Primary side applied pressure 1.0MPa or lessWhen the end connection is a sluice valve flange for water supply, the applied pressure on the primary side is 0.75 MPa or less. For nominal diameters of 200 or less, we also manufacture primary side applicable pressure of 1.6 MPa or less (JIS 16K RF flange) (if the main body is made of FC, it does not meet the performance standards of the Waterworks Law). 1.0MPa or lessWhen the end connection is a sluice valve flange for water supply, the applied pressure on the primary side is 0.75 MPa or less. For nominal diameters of 200 or less, we also manufacture primary side applicable pressure of 1.6 MPa or less (JIS 16K RF flange) (if the main body is made of FC, it does not meet the performance standards of the Waterworks Law).
Secondary adjustment pressure range (set pressure) Nominal diameter 200 or less L: 0.05 to 0.35, H: 0.3 to 0.95 MPa
Nominal diameter 250 or more L: 0.05 to 0.35, H: 0.3 to 0.7 MPa
Nominal diameter 200 or less L: 0.05 to 0.35, H: 0.3 to 0.95 MPa
Nominal diameter 250 or more L: 0.05 to 0.35, H: 0.3 to 0.7 MPa
Maximum decompression ratio 10: 1 10: 1
Minimum differential pressure before and after the valve 0.05MPa 0.05MPa
offset Secondary side adjustment pressure 0.05-0.35MPa: within 0.08MPaWhen the applied pressure on the primary side is 1.6MPa or less, the adjustment pressure range on the secondary side is 0.05 to 0.35MPa within 0.09MPa, and the adjustment pressure range on the secondary side is 0.3 to 1.0MPa within 0.14MPa.
Secondary side adjustment pressure 0.3 to 0.95 (0.7) MPa: Within 0.1 MPaWhen the applied pressure on the primary side is 1.6MPa or less, the adjustment pressure range on the secondary side is 0.05 to 0.35MPa within 0.09MPa, and the adjustment pressure range on the secondary side is 0.3 to 1.0MPa within 0.14MPa.
Secondary side adjustment pressure 0.05-0.35MPa: within 0.08MPaWhen the applied pressure on the primary side is 1.6MPa or less, the adjustment pressure range on the secondary side is 0.05 to 0.35MPa within 0.09MPa, and the adjustment pressure range on the secondary side is 0.3 to 1.0MPa within 0.14MPa.
Secondary side adjustment pressure 0.3 to 0.95 (0.7) MPa: Within 0.1 MPaWhen the applied pressure on the primary side is 1.6MPa or less, the adjustment pressure range on the secondary side is 0.05 to 0.35MPa within 0.09MPa, and the adjustment pressure range on the secondary side is 0.3 to 1.0MPa within 0.14MPa.
End connection JIS 10K RF flange or sluice valve flange for water supplyWhen the end connection is a sluice valve flange for water supply, the applied pressure on the primary side is 0.75 MPa or less. For nominal diameters of 200 or less, we also manufacture primary side applicable pressure of 1.6 MPa or less (JIS 16K RF flange) (if the main body is made of FC, it does not meet the performance standards of the Waterworks Law). JIS 10K RF flange or sluice valve flange for water supplyWhen the end connection is a sluice valve flange for water supply, the applied pressure on the primary side is 0.75 MPa or less. For nominal diameters of 200 or less, we also manufacture primary side applicable pressure of 1.6 MPa or less (JIS 16K RF flange) (if the main body is made of FC, it does not meet the performance standards of the Waterworks Law).
Mounting posture Horizontal / vertical freedom (however, for nominal diameters of 250 or more, it is mounted upright on horizontal pipes)When installing in vertical piping, leave a large maintenance space. Horizontal / vertical freedom (however, for nominal diameters of 250 or more, it is mounted upright on horizontal pipes)When installing in vertical piping, leave a large maintenance space.
Basic valve material body FC FCD
Basic valve material Main part Valve seat CAC406 CAC406
Basic valve material Main part Diaphragm NBR NBR
Basic valve material Main part disc NBR NBR
Basic valve coating or coating coating Inner surface: Liquid epoxy resin for water supply Inner surface: Liquid epoxy resin for water supply
  • WVR-02PN type (main body inner and outer surface epoxy resin powder coating, nominal diameter 80-200), WVR-02N type (main body material FC, liquid epoxy resin coating for inner water supply, nominal diameter 80-200) 300) is also manufactured. (Excluding JIS 16K RF flange made by FC)
  • We also manufacture with two pressure gauges.
  • Please refer to page 84 for the nominal diameter selection chart.

Download materials

Download materials

Common to all product symbols

WVR-02 Catalog

WVR-02 Price List

WVR-02 (FCD_16K) outline drawing

WVR-02 (FC_16K) outline drawing

WVR-02 (40,50A) Instruction Manual

WVR-02 (65-200A) Instruction Manual

WVR02-B □

WVR02-B(50A) FC reference drawing

WVR02-B(65-200A) FC reference drawing

WVR02-L □

WVR02-L(40,50A) FCD reference drawing

Frequently Asked Questions and Explanations

What is the useful life (the number of years recommended for replacement)?

The useful life of the main unit is about 8 years, but it depends on the usage conditions and environment.

Is it possible to reduce the hydrostatic pressure (without flowing water)?

When no water is flowing (flow rate 0), the valve is closed and the secondary side holds the set pressure.

What happens if the minimum flow rate or minimum differential pressure is exceeded?

If the conditions are outside the specified range, control will be lost and operation will become unstable.

Inquiries about this product

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