Differential pressure controller
The flanged STAP is a high-performing differential pressure controller that keeps the differential pressure over the load constant. This delivers accurate and stable modulating control, ensures less risk of noise from control valves, and results in easy balancing and commissioning. STAP’s unrivalled accuracy and compact size make it particularly suitable for use on the secondary side of heating and cooling systems.
Technical description
Application:
Heating (not steam) and cooling systems.
Function:
Differential pressure control
Adjustable Δp
Measuring points
Shut-off
Dimensions:
DN 65-100
Pressure class:
PN 16
Max. differential pressure (ΔpV):
350 kPa (117 ft H2O/51 PSI)
Setting range:
20-80 kPa resp 40-160 kPa.
(6.69-26.8 Ft H2O / 2.90-11.6 PSI resp 13.4-53.5 Ft H2O / 5.80-23.2 PSI)
Temperature:
Max. working temperature: 120°C
Min. working temperature: -20°C
Material:
Valve body: Ductile iron EN-GJS-400-15 (~ASTM A536 Grade 60-40-18, ISO 1083 Grade 400-15)
Bonnet: AMETAL®
Cone: AMETAL®
Spindles: AMETAL®
O-rings: EDPM rubber
Seat seal: Plug with EPDM O-ring
Membrane: Reinforced EPDM rubber
Spring: Stainless steel
Handwheel: Polyamide
AMETAL® is the dezincification resistant alloy of TA.
Surface treatment:
Valve body: Epoxy painting.
Marking:
Body: TA, Class 150, DN, CE, ASTM 60-40-18, flow direction arrow and casting date (year, month, day).
Bonnet and handwheel: Label with STAP, DN, PN, ΔpL in Ft H2O, PSI and kPa, and bar code.
Face to face:
ISO 5752 series 1 and EN 558-1 series 1.
Flanges:
Class 150 according to ASME/ANSI B16.42 (~ PN 20 according to ISO 7005-2).