RD-14H type
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A direct acting pressure reducing valve for water, liquid, and air that has a small pressure fluctuation range and can be used from small to large flow rates.
In building equipment, it is used for water supply pressure control from elevated water tanks of middle- and high-rise buildings to each floor, water supply pressure control by direct connection to a pump that does not depend on the elevated water tank method, and other boiler water supply. For industrial use, it is used for fuel oil, lubricating oil, air pressure control, etc.

Major features

  • Due to the pressure balance structure, the change in the set pressure is small.
  • Maintenance is easy because the inside can be inspected by disassembling from one direction on the upper side.
  • RD-14CN type is a nylon coating to prevent red water.

specification

Product code RD14H-B □The symbol of the secondary adjustment pressure range is entered in □.
Valve type Pressure reducing valve
type For hot water and oil
Nominal diameter 15-150 (1/2-6)
Applicable fluid Hot water / oil
(Those that do not corrode materials)When using it for a water supply device, use the RD-14CN type and RD-14PN type, which comply with the performance standards of the Waterworks Law.In the case of fuel oil, gasoline, light oil, etc., the material of the main body may be specified depending on the destination (Ministry of Land, Infrastructure, Transport and Tourism, Ministry of Defense, etc.), so please check.
Fluid temperature 5 to 90 ° C
Fluid viscosity 800cSt or less
Primary side applied pressure 1.0MPa or less
Secondary adjustment pressure range (set pressure) Nominal diameter 80 or less L: 0.05 to 0.35 MPa, M (RD-14CN type is H): 0.3 to 0.7 MPa
Nominal diameter 100 or more L: 0.05 to 0.35 MPa, M (RD-14CN type is H): 0.3 to 0.5 MPaFor RD-14W, 14H type, secondary adjustment pressure range: nominal diameter 80 or less: 0.65 to 0.95MPa, nominal diameter 100 or more: 0.45 to 0.8MPa are also manufactured.
Maximum decompression ratio 10: 1
Minimum differential pressure before and after the valve 0.05MPa
Allowable leakage amount None (visual pressure gauge)
Minimum adjustable flow rate 2-5L / min
End connection JIS 10K RF flange
Painting or coating coating Inner surface: rust preventive oil
Exterior: metallic blue, cap: red
Mounting posture Horizontal / vertical freedomWhen installing in vertical piping, keep the nominal diameter up to 80 and allow a large maintenance space. If the nominal diameter is 100 or more, install it upright on the horizontal pipe.
Material body FC
Material disc NBR
Material parts CAC406, SUS
  • We also manufacture the RD-14PN type (inner and outer surface epoxy resin powder coating) that conforms to the performance standards of the Waterworks Law.
  • We also manufacture a pressure gauge with a connection hole (JIS Rc1 / 4 screw) on the side of the main body, or a pressure gauge with a pressure gauge attached to it. (The maximum scale of the pressure gauge is 1.6MPa on the primary side, and the adjustment pressure range L (0.6MPa) and M, H (1.6MPa) on the secondary side.)

Download materials

Download materials

Common to all product symbols

RD-14H Catalog

RD-14H Price List

RD-14H outline drawing

RD-14H Instruction Manual

RD14H-B □

RD14H-B (100-150) reference diagram

RD14H-B (15-80A) 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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Notation on catalogs and websites

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Contains characters that indicate pressure classification and options.

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