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Thread Type-illustration

Pressure Gauge：(依流體選用)
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：(依流體選用)
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	153	4.0
REF-25-S	1"	82	153	6.5
REF-40-S	1 1/4"	115	190	13.0
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