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This series reducing valve is direct action membrane type spring reducing valve, it is manufactured and designed on the basis of advantages of foreign same products. It is mainly composed of membrane, valve flap, and adjusting spring. It sense the change of lower stream pressure through the membrane and drive the valve flap, change and control the valve opening to realize the function of pressure reducing the regulating. Set the outlet pressure by adjusting the spring pressure through adjusting bolt The product enlarges the area of membrane and improves the sensitivity. It is suitable for branch pipe of high buildings and apartment.
Field of Application.
Product Name: YZ11X Direct Action Diaphragm type Branch Pipe PRV.
Pressure Rating: 1.0- 1.6. Mpa.
Nominal Diameter: DN15-50 mm.
Body Material: Brass, CF8.
Standard Screwed: NPT, BSP.
Main Technical Parameters and Indexes of Performance.
| Nominal Pressure | 1.0 Mpa | 1.6 Mpa |
| Tested Pressure of Shell | 1.5 Mpa | 2.4 Mpa |
| Sealing Test Pressure | 1.0 Mpa | 1.6 Mpa |
| Maximum Upstream Pressure | 1.0 Mpa | 1.6 Mpa |
| Pressure Range of Outlet | 0.05-0.55 Mpa | 0.05-0.8 Mpa |
| Minimum Differential Pressure | 0.1 Mpa | 0.1 Mpa |
| Medium | Water | |
| Operating temperature | 0-80 | |
*the shell test does not include membrane and top cover.
Flow Characteristics.
| DN | 15(1/2") | 20(3/4") | 25(1") | 32(1 1/4") | 40(1 1/2") | 50(2") |
| Cv | 1 | 2 | 3 | 5 | 8 | 14 |
Material of Main Component.
| Name of component | Material of component |
| Valve body | Copper alloy |
| Valve Cover | Copper alloy |
| Valve Flap | Copper alloy |
| O-shaped Ring | Ding nitrile rubber |
| Sealing Ring | Ding nitrile rubber |
| Membrane | Clamps fabric Ding nitrile rubber |
| Adjusting Spring | 60Si2Mn |
| Adjusting Bolt | 2Cr13 |
Main External Dimensions.
 |
| DN | G | L | H | H1 | |
| P2* 0.55MPa | P2* 0.8MPa | ||||
| 15(1/2") | G1/2" | 65 | 75 | 90 | 35 |
| 20(3/4") | G3-4" | 75 | 85 | 100 | 35 |
| 25(1") | G1" | 90 | 3 | 115 | 46 |
| 32(1-1/4") | G1-1/4" | 105 | 130 | 150 | 55 |
| 40(1-1/2") | G1-1/2" | 120 | 155 | 175 | 65 |
| 50(2") | G2" | 140 | 175 | 195 | 75 |