Direct Activated Pressure Reducing Valve

Size Range : 1/2″ to 3″ Screwed / Flanged

Silent Features

  • The gate is designed for opening status, which will not fluence the water supply function under unstable inlet pressure condition.
  • When the outlet pressure responds directly to the pressure control chamber and the setting pressure, it responds quickly and adjusts the pressure accurately.
  • Pressure Adjusting Range : 1 ~ 5 kgf/cm2, 4 ~ 9 kgf/cm2, (special order is needed for other range)
  • Valve Body Testing Pressure : 24 kgf/cm2
  • Maximum Applied Pressure : 16 kgf/cm2
  • Pressure needed form fully-closed gate to fully-opened
  • gate 1 kgf/cm2 (1 kgf/cm2 = 14.2 psi)
  • Applied Temperature : -15 ~ 80 °C
  • Applied Condition : Fluid & Air
Dimensions :  (All Dimensions are in mm)
Valve Model Valve Size L H CV Weight Approx.
MM Inch
4M-SDF – 15 15 1/2″ 61 70.5 2 0.532
4M-SDF – 20 20 3/4″ 71 74 6 0.656
4M-SDF – 25 25 1″ 81 83 8 0.887
4M-SDF – 32 32 1.1/4″ 90.5 121 16 1.289
4M-SDF – 40 40 1.1/2″ 110.5 125.5 18 2.261
4M-SDF – 50 50 2″ 115 125.5 21 2.642
4M-SDF – 65 65 2.1/2″ 158 134 —- On Req.
4M-SDF – 80 80 3″ 180 141 —- On Req.
No. Description Material Qty.
01 Body CF8 / CF8M 01
02 Bonnet CF8 / CF8M 01
03 Plug CF8 / CF8M 01
04 Plug V – Seal NBR / Viton 01
05 Sealing Spacer Seat NBR / Viton / PTFE 01
06 Piston S. S. 304 / 316 01
07 Bonnet Cover CF8 / CF8M 01
08 Diaphragm NBR / Viton / PTFE 01
09 End Cover CF8 / CF8M 01
10 Spring Spring Steel 01
11 Spring Guide Brass / S. S. 410 01
12 Diaphragm Washer S. S. 304 / 316 01
13 Adjusting Piston Bolt S. S. 304 / 316 01
14 End Cover O – Ring NBR / Viton 01
15 Cover for O – Ring NBR / Viton 01
16 Bonnet Fitting Bolt Bonnet Fitting Washer S. S. 304 / 316 06
17 Adjusting Bolt S. S. 304 / 316 01
18 Adjusting Nut S. S. 304 / 316 01