RD-11 type
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This valve is a direct acting pressure reducing valve and is used for decompression of cold and hot water for building equipment and industry, or for decompression of water supply line for field irrigation. By adopting a pressure balance structure, the valve structure keeps the secondary pressure constant without being affected by fluctuations in the primary pressure.
Where to use
Upland irrigation

specification

Product code RD11-B □The symbol of the secondary adjustment pressure range is entered in □.
Valve type Pressure reducing valve
Nominal diameter 20-150 (3/4-6)
Applicable fluid Fresh water, industrial water, agricultural water
Fluid temperature 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.
Secondary adjustment pressure range (set pressure) Nominal diameter 20-80 L: 0.05-0.1, M: 0.1-0.25, H: 0.25-0.35, S: 0.35-0.5MPaFor nominal diameters of 20 to 80, we also manufacture a secondary adjustment pressure range of 0.5 to 0.8 MPa.
Nominal diameter 100-150 L: 0.05-0.1, M: 0.1-0.25, H: 0.25-0.4, S: 0.4-0.45, V: 0.45-0.5MPa
Maximum decompression ratio 10: 1
Minimum differential pressure before and after the valve 0.05MPa
Deadline boost 0.025MPa or less
Allowable leakage amount None (visual pressure gauge)
Minimum adjustable flow rate 2-5 L / min
End connection JIS 10K RF flanges (nominal diameters 100 to 150 are also manufactured for water sluice valve flanges.When the end connection is a sluice valve flange for water supply, the applied pressure on the primary side is 0.75 MPa or less. )
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 diaphragm NBR
Material disc NBR
Material parts CAC406, SUS
  • We also manufacture a pressure gauge with a connection hole on the side of the main body (nominal diameter 80 or less: JIS Rc1 / 4 screw, nominal diameter 100 or more: JIS Rc3 / 8 screw), or a pressure gauge with a pressure gauge attached to it. I am. (The maximum scale of the pressure gauge is 1.6MPa on the primary side, adjustment pressure range L, M (0.6MPa), H to V (1.6MPa) on the secondary side.)

Download materials

Download materials

Common to all product symbols

RD-11 Catalog

RD-11 Price List

RD-11 Instruction Manual

RD11-B □

RD11-B (100-150A) reference diagram

RD11-B (20-80A) reference diagram

RD11-BS (20-80A) reference drawing

RD11-BV (20-80A) reference diagram

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

RD44N-F □

Contains characters that indicate pressure classification and options.

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