PRODUCT OVERVIEW
The self operated pressure (differential pressure) regulating valve is composed of valve body, valve seat, valve core components, etc. it is an energy-saving product that automatically regulates the pressure only by relying on the pressure change of the regulated medium without external energy. It can be used for the pressure control device of non corrosive liquid, gas, steam and other media. Compared with the zzyp series, the control spring is far from the valve body, is not easily affected by the medium temperature, and is easier to replace or adjust the spring. Therefore, the valve is widely used in petroleum, chemical industry, metallurgy, light industry and other industrial departments and urban heating and heating systems. Self operated pressure (differential pressure) regulating valve series products, nominal pressure PN16, 25, 40, nominal diameter range 20 ~ 300mm, service temperature ≤ 350 ℃. There are a variety of varieties to choose from, with a larger differential pressure range than the old model.
MAIN TECHNICAL PARAMETERS
| Nominal diameterDN | 20 | 20 | 20 | 20 | 20 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
|---|
| Rated flow coefficient kV | 7 | 11 | 20 | 30 | 48 | 75 | 120 | 190 | 300 | 480 | 760 | 1100 | 1750 |
| Rated stroke L（mm） | 8 | 10 | 14 | 20 | 25 | 40 | 50 | 60 | 70 |
| Nominal pressure（MPa） | 1.6、2.5、4.0 |
| Pressure regulation range (kPa) | 15～50、40～80、60～100、80～140、120～180、160～220、200～260、
240～300、280～350、330～400、380～450、430～500、480～560、540～620、
600～700、680～800、780～900、880～1000、600～1500、1000～2500 |
| Inherent flow characteristics | 快开 |
| Adjustment accuracy (%) | ±5 |
| Service temperature (℃) | ≤350 |
| Allowable leakage | Hard seal(L/h) | Single seat: ≤ 10-4 × Rated capacity of valve (class IV), double seat and sleeve: ≤ 5 × Rated capacity of 10-3 valve (class II) |
| Soft seal(mL/min) | 0.15 | 0.30 | 0.45 | 0.60 | 0.90 | 1.70 | 4.0 | 6.75 | 11.10 | 16.0 |
| Decompression ratio | maximum | 10 |
| minimum | 1.25 |
MATERIAL OF MAIN PARTS
| valve body | ZG230～450、ZG1Cr18Ni9Ti、ZGCr18Ni12Mo2Ti |
|---|
| Spool | 1Cr18Ni9Ti、Cr18Ni12Mo2Ti |
| Valve seat | 1Cr18Ni9Ti、Cr18Ni12Mo2Ti |
| Valve stem | 1Cr18Ni9Ti、Cr18Ni12Mo2Ti |
| Membrane cover | A3、1Cr18Ni9Ti |
| Filler | Polytetrafluoroethylene, flexible graphite |
| diaphragm | Nitrile rubber, oil resistant rubber, fluororubber |
MAIN OVERALL DIMENSIONS
| Nominal diameterDN | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
|---|
| L | 185 | 200 | 205 | 222 | 254 | 276 | 298 | 352 | 410 | 451 | 600 | 670 | 735 |
| H | 52.5 | 57.5 | 67.5 | 72.5 | 80 | 90 | 97.5 | 107.5 | 122.5 | 140 | 167.5 | 225 | 230 |
| H1 | 615 | 645 | 650 | 710 | 730 | 745 | 760 | 800 | 890 | 960 | 1050 | - | - |
