4
Direct-Activated
Model：RFF(Flange Type)、RFT(Thread Type)

Flange Type

 Product accent：
  • The whole set is made by stainless steel #316, and it is suitable for the fluid of pure water, acid & alkaline fluid, vapor or air.
  • Back pressure valve can maintain required pressure.
  • Design of piston and diaphragm improves the inability of sustaining pressure and leakage.
  • Back pressure chamber controls the valve gate and let gate respond, quickly and adjust pressure accurately.
  • Pressure Adjusting Range：
    1 kgf / cm2∼5 kgf / cm2
    4 kgf / cm2∼10 kgf / cm2
  • Applied Temperature：-15℃∼100℃
  • Valve Body Testing Pressure：35kgf /cm2
  • Maximum Applied Pressure：25kgf /cm2
  • Pressure gauge indicates the sustaining pressure.
  • Please Cover steam pipelines with thermal materials

Thread Type-illustration

  1. Gauge：Stainless Steel
  2. Upper Cover：Stainless Steel 316
  3. U-ring：NBR / Viton
  4. Piston：Stainless Steel 316
  5. Sealing Spacer：NBR / Viton/Teflon
  6. Shaft：Stainless Steel 316
  7. Main Body：Stainless Steel 316
  8. Diaphragm：NBR / Viton
  9. HU-ring：NBR / Viton
  10. Spring：Spring Steel
  11. Lower Cover：Stainless Steel 316
  12. Washer ：Brass
  13. Adjusting Stem：Stainless Steeel 304
Item No Thread Type H L CV
RFT-15S 1/2" 75 71 2.5
RFT-20S 3/4" 75 86 4.0
RFT-25S 1" 81 90 6.5
RFT-40S 1 1/2" 115 115 13.0
RFT-50S 2" 115 120 17.0

尺寸單位：mm

Flange Type-illustration

  1. Gauge：Stainless Steel
  2. Upper Cover：Stainless Steel 316
  3. O-ring：NBR / Viton
  4. Main Body：Stainless Steel 316
  5. U-ring：NBR / Viton
  6. Shaft：Stainless Steel 316
  7. Sealing Spacer：NBR / Viton / Teflon
  8. Seat：Stainless Steel 316
  9. Diaphragm：NBR / Viton
  10. UH-ring：NBR / Viton
  11. Washer：NBR / Viton
  12. Fixed Bolt：Stainless Steel 304
  13. Spring：Spring Steel
  14. Lower Cover：Stainless Steel 316
  15. Washer：Brass
  16. Adjusting Stem：Stainless Steel 304

Item No Flange Type H L CV
RFF-15-S 1/2" 75 150 2.5
RFF-20-S 3/4" 82 150 4.0
RFF-25-S 1" 82 150 6.5
RFF-40-S 1 1/2" 115 190 13.0
RFF-50-S 2" 115 192 17.0
RFF-65-S 2 1/2" 185 210 30.0
RFF-80-S 3" 185 225 42.0
RFF-100-S 4" 230 250 75.0
RFF-150-S 6" 290 310 170.0

尺寸單位：mm

Back Pressure (Sustaining) Valve

Installed in branch pipe to maintain the Stable pressure of fluid inside pipe. When pressure exceeds setting valve, it will automatically release over high pressure.

Pressure Relief Valve

Installed in branch pipe. When pressure exceeds setting valve, valve gate will quickly and fully open to release pressure. As pipeline pressure goes down to certain level, valve gate will close slowly.

Applied condition of Back Pressure Valve:

  • Example1
  • ◎ In different pressure systems of processing pipeline, installing back pressure valve can maintain required pressure of the systems and ensure safe uses of equipment after pressure reducing valve reduces pressure.
 
  • Example2

    ◎ Installed back pressure valve enables largest flow application and also stabilizes pipeline pressure.

Flow Chart of Direct-activated Back Pressure Valve


Z-Tide Valves Industrial Co.,Ltd     
        TEL:(02)2999-8885•FAX:(02)2999-7456•E-mail: zt.valve@msa.hinet.net 
 Official Exporting Department :    Elite Line Industrial Corporation
上海地區銷售代理商 上海僑鼎閥門有限公司
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