Valve Body is made by Stainless Steel #316, suitable for fluid, air and vapor.
The gate is balanced-pressure designed, which will not influence the outlet pressure caused by unstable inlet pressure.
When the outlet pressure responds directly to the pressure control chamber and adjusts the setting pressure, it responds quickly and adjusts the pressure accuraby.
Design of piston and diaphragm improves the inability of sustaining pressure and leakage.
Please cover steam pipelines with thermal materials
Special order can be arranged for higher pressure adjustment range
Thread Type-illustration
Pressure Gauge
Upper Cover：Stainless Steel 316
U-ring：NBR / Viton
Piston：Stainless Steel 316
Sealing Spacer：NBR / Viton/Teflon
Shaft：Stainless Steel 316
Main Body：Stainless Steel 316
Diaphragm：NBR / Viton
HU-ring：NBR / Viton
Spring：Spring Steel
Lower Cover：Stainless Steel 316
Washer ：Brass
Adjusting Stem：Stainless Steeel 304
Item No
Thread Type
H
L
CV
RET-15S
1/2"
75
71
2.5
RET-20S
3/4"
75
86
4.0
RET-25S
1"
81
90
6.5
RET-40S
1 1/2"
115
115
13.0
RET-50S
2"
115
120
17.0
尺寸單位：mm
Flange Type-illustration
Pressure Gauge
Upper Cover：Stainless Steel
O-ring：NBR / Viton
U-ring：NBR / Viton
Piston：Stainless Steel 316
Sealing Spacer：NBR / Viton
Shaft：Stainless Steel 316
Diaphragm：NBR / Viton
Main Body：Stainless Steel 316
UH-ring：NBR / VIiton
Fixed Bolt：Stainless Steel 304
Spring：Spring Steel
Lower Cover：Stainless Steel 316
Washer：Brass
Adjusting Stem：Stainless Steel 304
Item No
Flange Type
H
L
CV
REF-15-S
1/2"
75
150
2.5
REF-20-S
3/4"
82
150
4.0
REF-25-S
1"
82
150
6.5
REF-40-S
1 1/2"
115
190
13.0
REF-50-S
2"
115
192
17.0
REF-65-S
2 1/2"
185
210
30.0
REF-80-S
3"
185
225
42.0
REF-100-S
4"
230
250
75.0
REF-150-S
6"
290
310
170.0
尺寸單位：mm
Applied Condition of Direct-activated Pressure Reducing Valve
Installing pressure reducing valve directly in the sub-pipe can reduce fluid pressure inside the pipe.
Installing a filter in the inlet of pressure reducing valve can prevent block of valve gate caused by impurities and limescale.
Installing pressure relief valve downstream pressure reducing valve can protect the system.
While using screws to connect pressure reducing valve, joints should be installed in the inlet and outlet to make maintenance easy.
Pressure Setting and Flow Rate of Direct-activated Pressure Reducing Valve
Direct-activated pressure reducing valve directly opens and closes the valve gate by the outlet pressure. When outlet pressure is under setting pressure, valve gate automatically opens. To make valve gate fully open, adjustable pressure range and setting pressure are relative points.
A: Pressure drop needed for fully-opened valve gate = , B=Adjustable Pressure Range Maximum – Minimum
B：Adjustable Pressure Range (=Maximum Minimum Adjustable Pressure Range)
C：Setting Pressure of Outlet
D：Pressure of fully-opened outlet valve gate, P=C-A
Example：
Pressure drop needed for fully-opened valve gate for adjusting pressure range 3~9 kgf/cm2 of direct-activated pressure reducing valve.
If the setting pressure of outlet is 6kgf / cm2, pressure of fully-opened valve gate will be P=6-1.5=4.5 kgf/ cm2(Outlet pressure should go down under 4.5kgf/ cm2 to make valve gate fully open)
Flow Chart of Direct-activated Pressure Reducing Valve
, B=Adjustable Pressure Range Maximum – Minimum
