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：21kgf /cm2
  • Pressure gauge indicates the sustaining pressure.

Thread Type-illustration

  1. Gauge：Stainless Steel
  2. 上蓋：Stainless Steel 316
  3. U型環：NBR / Viton
  4. 活塞導桿：Stainless Steel 316
  5. 止水墊片：NBR / Viton
  6. 活塞：Stainless Steel 316
  7. 主體閥：Stainless Steel 316
  8. 膜片：:NBR / Viton
  9. 止水環：NBR / Viton
  10. 彈簧：彈簧鋼
  11. 下蓋：Stainless Steel 316
  12. 彈簧墊片：黃銅
  13. 調壓螺絲：Stainless Steel 304
NO size(PT) H L CV
RFT-15S 1/2" 80 70 2.4
RFT-20S 3/4" 105 85 9.0
RFT-25S 1" 105 92 11.0
RFT-40S 1 1/2" 130 115 21.0
RFT-50S 2" 130 120 25.0

Flange Type-illustration

  1. Gauge：Stainless Steel
  2. Upper Cover：Stainless Steel 316
  3. Washer：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

NO size(PT) H L CV
RFF-15-S 1/2" 85 150 2.4
RFF-20-S 3/4" 105 150 9.0
RFF-25-S 1" 105 150 11.0
RFF-40-S 1 1/2" 130 190 21.0
RFF-50-S 2" 130 190 25.0
RFF-65-S 2 1/2" 185 210 75.0
RFF-80-S 3" 185 225 80.0
RFF-100-S 4" 230 250 120.0
RFF-150-S 6" 290 310 250.0

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 Valnes　ADD:NO.208,jhongshan Rd.,Sanchong City.Taipei County
TEL:(02)2999-8885•FAX:(02)2999-7456•E-mail: zt.valve@msa.hinet.net
We reserve the right to change the specifications listed in catalogues and the website without notice. c 2008 Z-Tide Valves All Rights Reserved.