SD Series- Water PRV

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.
direct actuated pressure reducing valve direct actuated pressure reducing valve
  • 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
direct acting pressure relief valve direct acting pressure relief valve
direct acting pressure relief valve direct acting pressure relief valve
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
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