STAP – ANSI flanges

Differential pressure controller size 2 1/2" - 4", adjustable set-point and shut-off function

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.

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Features & Benefits

Adjustable set-point

Delivers desired differential pressure ensuring accurate balancing.

Shut-off function

Shut-off function makes maintenance easy and straightforward.

Measuring points

Simplifies the balancing procedure, and increases its accuracy.

Technical Information

Technical description

Application:

Heating (not steam) and cooling systems.

Function:

Differential pressure control
Adjustable Δp
Measuring points
Shut-off

Dimensions:

2 1/2" - 4"

Pressure class:

Class 150
Temperature / Max. pressure:
-4 to 100 °F / 250 psi
200 °F / 235 psi
248 °F / 225 psi

Max. differential pressure (ΔpV):

117 ft H2O / 51 psi

Setting range:

6.69*-26.8 ft H2O / 2.90*-11.6 psi resp
13.4*-53.5 ft H2O / 5.80*-23.2 psi
*) Delivery setting

Temperature:

Max. working temperature: 248°F
Min. working temperature: 14°F

Media:

Water or neutral fluids, water-glycol mixtures (0-57%).

Material:

Valve body: Ductile iron EN-GJS-400-15 (~ASTM A536 Grade 60-40-18, ISO 1083 Grade 400-15)
Bonnet: AMETAL®
Cone: PTFE coated 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 IMI Hydronic Engineering.

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).

Articles

Flanged

3.28 ft (1 m) capillary pipe and transition nipple with shut-off are included.

Size	Number of bolt holes	D [in]	L [in]	H [in]	Cv_m	q_max [gpm]	lb	EAN	Article No
2.90-11.6 psi
2 1/2"	4	7.1	11.4	12.6	41.8	112.2	47.4	7318793959607	52 266-065
3"	4	7.5	12.2	13.3	63.8	171.2	52.9	7318793959706	52 266-080
4"	8	9.1	13.8	13.8	127.6	342.3	63.9	7318793959805	52 266-090
5.80-23.2 psi
2 1/2"	4	7.1	11.4	12.6	41.8	112.2	47.4	7318793958204	52 266-165
3"	4	7.5	12.2	13.3	63.8	171.2	52.9	7318793958303	52 266-180
4"	8	9.1	13.8	13.8	127.2	342.3	63.9	7318793958402	52 266-190

→ = Flow direction

Cv_m = gpm at a pressure drop of 1 psi and maximum opening corresponding to the p-band (-25%).

Flanged

3.28 ft (1 m) capillary pipe and transition nipple with shut-off are included.

Size	Number of bolt holes	D [in]	L [in]	H [in]	Cv_m	q_max [gpm]	lb	EAN	Article No
2.90-11.6 psi
2 1/2"	4	7.1	11.4	12.6	41.8	112.2	47.4	7318793959607	52 266-065
3"	4	7.5	12.2	13.3	63.8	171.2	52.9	7318793959706	52 266-080
4"	8	9.1	13.8	13.8	127.6	342.3	63.9	7318793959805	52 266-090
5.80-23.2 psi
2 1/2"	4	7.1	11.4	12.6	41.8	112.2	47.4	7318793958204	52 266-165
3"	4	7.5	12.2	13.3	63.8	171.2	52.9	7318793958303	52 266-180
4"	8	9.1	13.8	13.8	127.2	342.3	63.9	7318793958402	52 266-190