Circuit valve, primary pressure control valve WVD-02 type differential pressure relief valve (for water / hot water)
- Where to use
- Air conditioning equipmentAir conditioning equipment
Major features
- Stable operation can be easily obtained by adjusting the sensitivity by adjusting the needle valve opening according to the usage conditions.
- A pump relief valve in a closed circuit that closes quickly when stopped.
- The basic valve and pilot valve can be easily disassembled for easy maintenance such as adjustment, repair, and parts replacement.
- The lift limiting mechanism can limit the overflow.
specification
| Product code | WVD02-B | WVD02-L |
|---|---|---|
| Valve type | Differential pressure control valve | Differential pressure control valve |
| Nominal diameter | 80-200 (3-8) | 80-200 (3-8) |
| Applicable fluid | Water / hot water | Water / hot water |
| Fluid temperature | 5-60 ° C | 5-60 ° C |
| Primary side applied pressure | 1.0MPa or less | 1.0MPa or less |
| Set differential pressure adjustment range | 0.05-0.3MPa | 0.05-0.3MPa |
| Blow-down pressure | Set pressure x 20% or less (minimum value 0.03MPa) | Set pressure x 20% or less (minimum value 0.03MPa) |
| Accumulation | Within 0.05MPa | Within 0.05MPa |
| End connection | JIS 10K RF flange | JIS 10K RF flange |
| Pressure resistance test (water pressure) | 1.5MPa at water pressure | 1.5MPa at water pressure |
| Mounting posture | Horizontal / verticalWhen installing in vertical piping, leave a large maintenance space. | Horizontal / verticalWhen installing in vertical piping, leave a large maintenance space. |
| Material body | FC | FCD |
| Material Valve seat | CAC406 | CAC406 |
| Material parts | NBR | NBR |
| Basic valve painting inner surface | Liquid epoxy resin for water supply | Liquid epoxy resin for water supply |
- We also manufacture with two pressure gauges. (The maximum scale of the pressure gauge is 1.6MPa on both the primary and secondary sides.)
- Refer to page 160 of the general catalog for selection of differential pressure control valves and page 157 for the nominal diameter selection chart.
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Frequently Asked Questions and Explanations
What is the purpose of the primary pressure control valve installed on the outlet side of the pump?
It is used to prevent overheating due to shutoff operation of the pump and to keep the pump discharge pressure constant.
What is a back pressure valve?
Refers to the primary pressure control valve. A regulating valve that discharges fluid in response to changes in the force on the primary side in order to maintain the fluid pressure on the primary side at a certain constant pressure.
What is the purpose of the water fall prevention valve?
Please check the details.
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