4
Model¡GRFF(Flange Type)¡BRFT(Thread Type)

Flange Type

 Product accent¡G
  • 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¡G
    1 kgf / cm2¡ã5 kgf / cm2
    4 kgf / cm2¡ã10 kgf / cm2
  • Applied Temperature¡G-15¢J¡ã100¢J
  • Valve Body Testing Pressure¡G35kgf /cm2
  • Maximum Applied Pressure¡G25kgf /cm2
  • Pressure gauge indicates the sustaining pressure.
  • Please Cover steam pipelines with thermal materials

Thread Type-illustration

  1. Gauge¡GStainless Steel
  2. Upper Cover¡GStainless Steel 316
  3. U-ring¡GNBR / Viton
  4. Piston¡GStainless Steel 316
  5. Sealing Spacer¡GNBR / Viton/Teflon
  6. Shaft¡GStainless Steel 316
  7. Main Body¡GStainless Steel 316
  8. Diaphragm¡GNBR / Viton
  9. HU-ring¡GNBR / Viton
  10. Spring¡GSpring Steel
  11. Lower Cover¡GStainless Steel 316
  12. Washer ¡GBrass
  13. Adjusting Stem¡GStainless 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

Measuring Unit¡Gmm


Flange Type-illustration

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

Measuring Unit¡Gmm


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: +886-7-331-1060 FAX: +886-7-331-0100 E-mail: sales@z-tide.com
Official Exporting Department: Elite Line Industrial Corporation
Z-TIDE Group Elite Line Industrial Corp
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