Pressure Control - Regulating Upstream
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MK56 Air Loaded Back Pressure Reg
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MK56 uses air (or gas) loaded on top of the diaphragm, instead of a conventional regulator where a spring applies the loading force that determines the set pressure. It has no spring or pilot and has the same rangeability (40:1) as a MK57, considered to be the most accurate regulator in the range.
By eliminating the spring, the regulator has almost no droop but the big advantage is being able to remotely control the set pressure and the wide pressure range that can be controlled. A conventional regulator might be able to regulate between 200-900 kpa but the MK56 could be loaded to provide upstream pressure control between a few kpa and then be adjusted right up to the maximum body pressure of the valve (890 psi for SS body). No spring changes..just adjust the pressure being loaded on the dome. The dome loading can be done by a loading station but the simplest method is just by using a JPR regulator from the Low Flow section or a conventional Air Filter Regulator. Adjust the regulator to a little over 5 kpa and the MK56 regulates the pressure to 5 kpa…..increase the air pressure to a little over 1200 kpa and the MK56 regulates to 1,200 kpa etc
Maximum inlet pressure- BZ 3,450 kpa; DI 4,140 kpa; WCB/316SS (6,550 kpa)
* Options: Low flow trim, stainless teel, buna or viton diaphragm, BSPP, BSPT, NPT or flanged.
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Model RFT Pressure Sustaining Valve (316ss, screwed)
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Elite model RFT is a 316ss self acting pressure sustaining valve suitable for fluids & gasses.
Available in ½” → 2” (Cv’s from 2.4 to Cv25) and the main materials are 316SS with NBR or Viton diaphragm and seals.
Valve has threaded BSP female ends.
Maximum inlet pressure-2500 kpa (362 psi)
Maximum temp- 100°C or 180°C
Adjutable pressure ranges – 100-500 kpa; 400-1,000 kpa* Options: NPT, all 316SS adjusting bolt/locknut, pressure gauge
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Model RFF Pressure Sustaining Valve (316ss, flanged)
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Elite model RFF is a 316SS self acting pressure sustaining valve suitable for fluids, air and steam.
Available in ½” → 6” (Cv’s 2.4-250) and the main materials are 316SS with NBR or Viton diaphragm and seals.
Valve has flanged ends which can be drilled to suit Ansi 150# or AS Table D/E, Cv’s from 2.4 to Cv250
Maximum inlet pressure-2500 kpa (362 psi)
Maximum temp- 100°C or 180°C for steam
Adjustable pressure ranges – 100-500 kpa; 400-1,000 kpa* Options: All 316SS adjusting bolt/locknut, pressure gauge.
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BTS/BFS Pilot Operated Pressure Sustaining Valve (CI/DI/BZ/304SS/316SS)
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Elite model BTS/BFS uses a MFV (multi-function valve) which is directly fitted with a pressure sustaining valve pilot and is used primarily for water. Unlike conventional pilot operated valves which have a complex external pilot valve tubing assembly, this valve does not have any external piping or tubing, saving cost and simplifying installation.
It is available in BTS threaded version 1½”→ 2” (Cv’s 48-75) and BFS flanged version in 2”-14” (Cv’s 75-3,000) and the choice of materials for the main valve are cast or ductile iron with bronze trim, bronze, 304ss or 316ss. Diaphragm and seat material can be either NBR or Viton and the pilot valve can be bronze or stainless steel.
Valve has either threaded ends (1½”→ 2”) or flanged (1/2”-6”) which can be drilled to suit Ansi 150# or AS Table D/E.
Maximum inlet pressure-2500kpa (362 psi)
Maximum temp- 80°C
Sustained pressure ranges – 20-400 kpa; 300-1,000 kpa* Options: Pressure gauge
