Circuit valve, primary pressure regulating valve MD-14H type primary pressure regulating valve
- Where to use
- Pump reliefPressure tank / piping
Major features
- Used as a pump relief valve. The operation is stable with a structure that considers hunting and vibration.
- It can be used as a relief valve for pressure tanks and piping.
- Since the piston type balance structure is adopted, the change in blowout pressure due to back pressure fluctuation is small.
- Maintenance is easy because the internal inspection can be performed by disassembling from one direction on the upper side.
- MD-14CN type is a rust-resistant nylon coating.
specification
| Product code | MD14H-B □The symbol of the set pressure adjustment range is entered in □. |
|---|---|
| Valve type | Primary pressure control valve |
| type | For hot water and oil |
| Nominal diameter | 15-150 (1/2-6) |
| Applicable fluid | Hot water / oil (things that do not corrode materials)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 |
| Set pressure adjustment range | Nominal diameter 80 or less L: 0.05 to 0.35MPa, M (MD-14CN type is H): 0.3 to 0.7MPa Nominal diameter 100 or more L: 0.05 to 0.35 MPa, M (MD-14CN type is H): 0.3 to 0.5 MPaMD-14W, 14H type also manufactures set pressure adjustment range: nominal diameter 80 or less: 0.65 to 1.0MPa, nominal diameter 100 or more: 0.45 to 0.8MPa. |
| Fluid viscosity | 800cSt or less |
| End connection | JIS 10K RF flangeWe also manufacture sluice valve flanges for waterworks with a nominal diameter of 100 or more. |
| 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 | FCIn 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. |
| Material parts | CAC406, SUS |
| Material Diaphragm disc | NBR |
| Painting or coating coating | Inner surface: rust preventive oil Exterior: metallic blue, cap: red |
- For MD-14W and 14H types, we also manufacture a pressure gauge with a connection hole (JIS Rc 1/4 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 the set pressure adjustment range L (0.6MPa), M, H (1.6MPa).)
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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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