B.A.S.E.E.F.A. EEx(d)certified. Zones 1 & 2 GroupsIIB + H2 T6.Ta 20 to +55CATEX certified CEII2GDEExd IIB + H2 T6 CAT 2Ta 55 to 75CIntrinsically safe certifiedEExia IIC T4, T5 & T6Differential Pressure, LowPressure and Vacuumoptions available.Stainless steel or blackanodised aluminium IP66rated enclosure.Calibrated adjustment scaleIncremental pressure rangesbetween 1.0 mBar 11 Bar

GENERAL

Incorporating a diaphragm and two sealing Belloframs this differential pressure switch offers reliable switchingaction when sensing a difference in pressure. Housed in a stainless steel or black anodised aluminium caseto IP66 standards and sensitive enough to operate at 1 mBar and can be offered with two microswitches set tooperate simultaneously along with internal resistors for end of line & short circuit monitoring.

Wetted parts: 1, 2 & 3 ANC4B Stainless steel and 8: 316 Stainless steelSeals: Fluorocarbon

TITANTYPE DPF266 & DPF296 EEx(d)/I.S.DIFFERENTIAL PRESSURE SWITCH

ADJUSTMENT RANGES

ADJUSTMENTRANGE(BAR G)

MAX WORKINGPRESSURE

(BAR)(EQUALISED)

MAX. WORKINGPRESSURE

(BAR)(one sided)

SWITCHINGDIFFERENTIAL

(mBAR)

SPRINGCODE

DIAPHRAGMSIZE

1.75 8.5 28 14 100 400 W 010.5 5.5 28 14 70 380 P 010.3 1.1 28 14 40 90 R 01

125 725 mBar 10 7 10 75 G 0250 250 mBar 10 7 5.0 27.5 G 0325 75 mBar 10 7 4.2 7.5 T 0315 55 mBar 3.5 0.35 5.0 7.5 S 084 16 mBar 3.5 0.35 0.75 2.0 R 081 5 mBar 3.5 0.35 0.4 0.75 T 08

B = BASEEFA OR ATEX APPROVALA = AAS (AUSTRALIA) APPROVALO = I.S. CERTIFIED

A = NITRILE DIAPHRAGMB = FLUOROCARBON DIAPHRAGMC = NEOPRENE DIAPHRAGM

A = BRACKET FOR 1 PRESSURE HOUSINGG = BRACKET FOR 2 PRESSURE HOUSINGW = BRACKET FOR 8 PRESSURE

PART NUMBER BREAKDOWN

SPRING COLOUR(see range sheet)

A = ALUMINIUM CASES = ST. STEEL CASE

D P F 2 6 6 S 1 B / B G F 0 1 S B 2 / A B

DIAPHRAGM SIZE01 = 1 DIAPHRAGM02 = 2 DIAPHRAGM03 = 3 DIAPRHAGM08 = 8 DIAPHRAGM(see range sheet)1 = 1 x SPDT SWITCH

2 = 2 X SPST SWITCH9 = 1 X HERMETCIALLY SEALED SWITCH

PRESSURE ENTRIES(1, 2 & 3 only) others via adaptors1 = BSP.P (FEMALE)2 = NPT (FEMALE) for 8 size diaphragm model1 = ELBOW COMPRESSION FITTINGS for O/D pipe2 = TEE FITTINGS

ELECTRICAL ENTRYA = M20 STRAIGHTB = M20 ANGLEDC = NPT STRAIGHTD = NPT ANGLEDE = NPT ANGLED

DP = STD DIFFERENTIALP = LOW PRESSUREV = VACUUM SWITCH(see note on above page)

A = ALUMINIUM SWITCHCASES ST. STEEL SWITCHCASE

B = FLUOROCARBON DIAPHRAGM A = STANDARD BRACKETE = 2 STANDPIPE BRACKET

PART NUMBER BREAKDOWN

D P F 2 9 6 S 1 B / B R F 2 7 / H 2 D A A

F L

PISTON SIZE(see range sheet)

ADJUSTMENT RANGES

ADJUSTMENTRANGE(BAR G)

MAX WORKINGPRESSURE

(BAR)(EQUALISED)

MAX. WORKINGPRESSURE

(BAR)(one sided)

SWITCHINGDIFFERENTIAL

(mBAR)

SPRINGCODE

DIAPHRAGMSIZE

1.5 - 3.5 140 28 < 0.9 G 183.5 10.5 140 28 < 1.5 W 277.5 11 140 28 < 2.0 B 18

B = BASEEFA OR ATEX APPROVALA = AAS (AUSTRALIA) APPROVALO = I.S. CERTIFIED

ELECTRICAL ENTRYA = M20 STRAIGHT D = NPT ANGLEDB = M20 ANGLEDC = NPT STRAIGHT

1 = 1 X SPDT SWITCH2 = 2 X SPDT SWITCH9 = 1 X HERMETICALLY SEALED MICROSWITCH

SPRINGCOLOUR(see range

sheet)

PROCESS ENTRIES1 = BSP FEMALE2 = NPT FEMALE

TYPE DPF296 EEx(d)/I.S.FLAMEPROOF HIGH STATICPRESSURE DIFFERENTIAL

TECHNICAL

Switchcase and covers: Temperature limitations:Stainless steel ANC4B BS3146 or black Ambientanodised aluminium alloy LM25TF. BASEEFA : Ta max. 20 to +55C T max. 85C T6

Wetted parts: As specific data sheets ATEX/Sira : Ta max. 55 to +75C T max. 85C T6 : Ta max. 55 to +75C T max. 100C T5

Microswitch form: 1 x SPDTContact material: Gold plated silver Process : -50 to 90C (Nitrile diaphragm/seals)Contact rating: 3A @ 30V dc inductive : -20 to 150C (Fluorocarbon diaphragm/seals)3A @ 250V ac inductive

Electrical connections: Clamp type terminalblock suitable for cable sizes 0.5 2.5mm Certification:

BASEEFA/CENELEC : EExd IIB + H2 T6Electrical conduit entry: M20 x 1.5 ISO ATEX/Sira : CE 112GD EExd IIC T6 Ta 50 to +75Cstraight entry. Adaptors available e.g. 90 angled I.S. Either EEx ia IIC T6 Ta = -50C to +40Cor NPT straight entry. or EEx ia IIC T5 Ta = -50C to +50C

or EEx ia IIC T4 Ta = -50C to +80CAccuracy: 2% BS6134:1991

DRAWINGS

The Pyropress Engineering Company LimitedBell Close, Newnham Industrial EstatePlympton, Plymouth, PL7 4JHTel : +44 (0)1752 339866Fax : +44 (0)1752 336681e-mail : sales@pyropress.comwww.pyropress.com

DRAWINGS