diaphragm pressure reducing valve
technical parameter
item model number: y42x
nominal diameter: dn15~500mm
nominal pressure: pn1.0~2.5mpa
working temperature: 0℃-80℃
main material: wcb, 2cr13, 2cr13/25 (hard chrome plating), 2cr13/copper alloy
drive mode: manual
flange standard: gb/t17241.6, gb/t9113
test standard: gb/t13927, api598
product description
the diaphragm type pressure reducing valve is mainly composed of adjusting spring, diaphragm, piston, valve seat, valve disc and other parts. the diaphragm is used to directly sense the downstream pressure to drive the valve disc, and the opening of the valve disc is controlled to complete the decompression and voltage regulation function. this product can replace conventional partitioned water pipes in the cold and hot water supply systems of urban buildings and high-rise buildings, saving equipment. it can also play the role of decompression and voltage regulation in the usual cold and hot water pipe network. this product has stable pressure regulation and voltage regulation, and is suitable for pipelines with water and non-corrosive liquid media.
the main technical parameters
| pn（mpa） | 1.0 | 1.6 | 2.5 |
| shell test pressure（mpa）* | 1.5 | 2.4 | 3.75 |
| seal test pressure（mpa） | 1.0 | 1.6 | 2.5 |
| maximum inlet pressure（mpa） | 1.0 | 1.6 | 2.5 |
| outlet pressure range（mpa） | 0.2-0.8 | 0.2-1.0 | 0.4-1.6 |
| pressure characteristic deviation（mpa）△p2p | gb12244-1989 | ||
| flow characteristic deviation（mpa）p2g | gb12244-1989 | ||
| leakage | 0 | ||
| operating temperature | 0℃-80℃ | ||
*: shell test does not include diaphragm, bonnet
main external connection dimensions
| dn | dimensions | ||
| l | h | h1 | |
| 15 | 160 | 265 | 100 |
| 20 | 160 | 265 | 100 |
| 25 | 180 | 285 | 110 |
| 32 | 200 | 285 | 110 |
| 40 | 220 | 320 | 120 |
| 50 | 250 | 320 | 120 |
| 65 | 280 | 335 | 140 |
| 80 | 310 | 425 | 165 |
| 100 | 350 | 445 | 185 |
| 125 | 400 | 590 | 225 |
| 150 | 450 | 625 | 260 |
| 200 | 500 | 680 | 280 |
| 250 | 650 | 855 | 335 |
| 300 | 800 | 935 | 385 |
| 350 | 850 | 1015 | 430 |
| 400 | 900 | 1095 | 455 |
| 450 | 900 | 1165 | 500 |
| 500 | 950 | 1205 | 525 |