restrictor check valve
technical parameter
item model number: lh45x
nominal diameter: dn50~1000mm
nominal pressure: pn1.0~2.5mpa
applicable temperature: 0°c~85°c
applicable medium: water
product description
lh45x current limiting check valve supports the working point of the pump to work in the high-efficiency area, restricts the large flow of the pump, and runs at low efficiency. at the same time, when the pump is stopped by the micro-resistance slow-closing check, it is closed without water hammer phenomenon; it can also prevent the pump from overloading and exceeding the rated value. the current burns out the motor, and there is a stepless adjustment of the head function, which limits the adjustable range of the head to 0.1-0.6mpa, the pressure is set at 0.1mpa, and the temperature of the adjustable medium is between 0-150℃.
the main technical parameters
dn | dn20-dn600 | |||
pn | 1.0mpa | 1.6mpa | 2.5mpa | |
test pressure | case | 1.5mpa | 2.4mpa | 3.75mpa |
seal | 1.1mpa | 1.76mpa | 2.75mpa | |
proper temperature | 0℃~80℃ | |||
lower working pressure | p1≥0.07mpa | |||
structure length standard | q/byl | |||
flange connection standard | gb/t 17241.6 | |||
test pressure standard | gb/t 13927 api 598 | |||
main external connection dimensions
dn | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
l | 150 | 160 | 180 | 200 | 203 | 216 | 241 | 270 | 292 | 330 | 400 | 480 | 550 | 622 | 685 | 750 | 811 | 935 |
h1 | 106 | 106 | 106 | 137 | 137 | 145 | 178 | 232 | 286 | 318 | 413 | 502 | 600 | 638 | 677 | 677 | 750 | 850 |