Construction

According to EN 60529 (IEC 529).IP 66 (68 as option) or IP 56 for relative diaphragm pressure switches manufacturer type FML, FMS, and FMT. Epoxy coated die-cast aluminium housing and cover.Polyester (FPP) or die-cast aluminium explosion-proof housing (RTPF) also available ( approved).Cadmium plated or stainless steel screws and bolts on extra.External set point setting.Factory sealed on request.Graduated internal scale. (OPTION : cover with scale window-IP 66)Sensing elements:–Bronze or stainless steel bellows (316L)–Stainless steel bourdon tube (316Ti) –NBR (standard), FKM or EPDM diaphragms –Copper or 316 Ti stainless steel temperature sensor manufacturer.According to type and range, diaphragm seals with or without capillary extension may be quoted against specification. As option a breather is available to limit condensation.Process connections: Brass or 316 L stainless steel 1/2 BSP according to EN ISO 228-1 / EN 837-11/4 BSP according to EN ISO 228-1 / EN 837-1 1/2 or 1/4 NPT on request. Mounting:– Panel 5 mm threaded holes as standard– Wall cadmium plated steel fixing clips (2off).Any special on request.

Electrical switching

1or 2 change over switches (SPDT).

and features

Dry, nitrogen sealed, explosion-proof or gold plated types according to application.Electrical entry:– 1 or 2, 3 wire screw terminal (1.5 mm
2 max.each)–1 or 2 packing gland (ISO M16) or ISO4400 connector –Approved screw terminal and packing gland for use in the EEx ed version–External earthing screw connection (optional).Other connection arrangements on request.

Pneumatic

1 or 2 NO or NC, or 1 NO +1NC - 1/8 BSPF (or M5) - Filtered air: 5 microns.

switching

Piloting pressure: 1.5 to 8 bar Operating temperature: -10 to +60°C Air supply and piloting connection: 1/8 BSP F (std), M5, 1/4 GF...Normally Open cell: NO or Normally Closed cell: NFPlease contact us for deadband values.

Certifications

All equipment designed in accordance with ATEX directives 94/9 EC. – EEx ia IIC T6LCIE 01 ATEX 6008X– EEx d IIC T6LCIE 01 ATEX 6071X– EEx ded IIC T6LCIE 01 ATEX 6071X– EEx ed IIC T6LCIE 02 ATEX 6161X

Applications

Every process fluids suitable with selected measuring element and process environement (see recommendations).

Temperature

Typical characteristics:

limits (material)

Bronze bellows :– 20 to +60°C St.St. bellows :– 20to +150°CBourdon tube:– 20to +150°CNBR diaphragm (Bunan
® type):– 20to +100°CFKM diaphragm (viton
® type):0to +150°CEPDMdiaphragm:– 40to +120°CTemperature bulbs according to specified range.

Working temperature

– 20 to +70 °C (except FB (A) and FC-ranges B, C and G: maxi 55 °C).

(housing)Storage temperature

– 40 to +70°C (except temperature switches ranges B, C and G: maxi 55 °C).

Repeatability

± 1 % full span deviation.

Recommendations

–Live, corrosive or cristallisable fluids will necessitate the use of well defined diaphragm seal.Process conditionsto be clearly specified when ordering.–Use upstream dampener against forseenable process quick changes (on/off values, piston pumps manufacturer for example).–Location must be choosen so that temperature of internals will never exceed maximum specified limits forcomplete assembly.Biggest care must be taken against radiations from heater sources.–It is strongly recommended to protect outdoor mounted instrument against excessive sunshine and nocturnalcondensations.Special attention to be paid when installing in coastal areas or damp atmospheres.Air exhausts,filters and drains are available as accessories.–High degree of protection against vibrations does not exclude choosing the most stable location.In some casesexcessive level of vibrations may necessitate the use of flexible piping connection together with silent-blocksmounting devices.–Upstream condensing pot or similar piping devices will be provided for steam pressure measurement.

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