BA, BAX
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BA, BAX - 1

Mechatronic pressure measurement Bourdon tube pressure switch Flameproof enclosure Ex d Models BA, BAX WIKA data sheet PV 32.21 Process Performance Series Applications ■■ Pressure monitoring and control of processes ■■ Safety-critical applications in general process instrumen- tation, especially in the chemical and petrochemical industries, oil and gas industries, power generation incl. nuclear power plants, water/wastewater industries, mining ■■ For gaseous, liquid and aggressive media, also in aggressive ambience Special features ■■ No power supply needed for switching of electrical loads ■■ Robust switch enclosure from aluminium, IP 66, NEMA 4X ■■ Setting ranges from 0 ... 2.5 bar up to 0 ... 1,000 bar, vacuum ranges ■■ Repeatability of the set point ≤ 0.5% of span ■■ 1 or 2 independent set points, SPDT or DPDT, high switch- Bourdon tube pressure switch model BA Description These high-quality pressure switches have been developed especially for safety-critical applications. The high quality of the products and manufacturing in accordance with ISO 9001 ensure reliable monitoring of your plant. In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested. All wetted materials are from stainless steel as a standard. In order to ensure as flexible operation as possible, the pressure switches are fitted with micro switches, which enable the switching of an electrical load of up to AC 250 V, 20 A directly. WIKA data sheet PV 32.21 ∙ 03/2016 Data sheets showing similar products: Pressure switch, stainless steel version; model BWX; see data sheet PV 32.20 For lower switching power ratings, such as for PLC applications, argon gas-filled micro switches with gold-plated contacts can be selected as an option. For applications with special requirements on the wetted parts, a version with Monel is available. By using a Bourdon tube measuring system, the model BA and BAX pressure switch is extremely robust and guarantees optimal operating characteristics and the highest measuring performances, with repeatability low

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BA, BAX - 2

Standard version Switch enclosure Aluminium alloy, copper-free, epoxy resin coated, tamper-proof. Laser-engraved label from stainless steel. Ingress protection IP 66 per EN 60529 / lEC 60529, NEMA 4X Permissible temperature Ambient Tamb: -40 ... +85 °C Switch contact Micro switches with fixed dead band ■ 1 x or 2 x SPDT (single pole double throw) ■ 1 x DPDT (double pole double throw) Micro switches with adjustable dead band ■ 1 x SPDT (single pole double throw) The DPDT function is realised with 2 simultaneously triggering SPDT micro switches within 0.2 % of the span. Ignition protection...

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BA, BAX - 3

Process connection Dielectric strength Stainless steel, lower mount (LM) Safety class I (IEC 61298-2: 2008) ■ % NPT female (standard) ■ V NPT, G V A, G % A male via adapter ■ V NPT, G % female via adapter ■ M20 x 1.5 male via adapter Electrical connection ■ V2 NPT female (standard) ■ % NPT, M 20 x 1.5, Gk V2, Gk % female ■ Cable gland non-armoured, Ex d, nickel-plated brass ■ Cable gland non-armoured, Ex d, stainless steel (AISI 304) ■ Cable gland armoured, Ex d, nickel-plated brass ■ Cable gland armoured, Ex d, stainless steel (AISI 304) For cable connections to the internal terminal...

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BA, BAX - 4

Mounting ■ Model BA: direct mounting or wall mounting ■ Model BAX: wall mounting, mounting fixture from stainless steel (AISI 304) Option: Mounting bracket for 2" pipe mounting For mounting positions see drawing on page 5. Options ■ Cleaned for oxygen service ■ Drying of wetted parts ■ Permissible ambient temperature to -60 ... +85 °C 1) ■ Offshore version 2) ■ NACE compliant to MR 0175, ISO 15156 and MR 0103 2) ■ Wetted parts from Monel® 1) Only available for contacts without hermetic sealing 2) WIKA recommends argon gas-filled contact versions, use of adjustable dead band allowed....

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BA, BAX - 5

Electrical connection Process connection Process connection Electrical connection Permissible mounting position Model BA Ordering information Model / Unit / Setting range / Number of switches / Contact type / Process connection / Electrical connection / Wetted parts / Options WIKA data sheet PV 32.21 ∙ 03/2016 WIKA Alexander Wiegand SE & Co. KG Alexander-Wiegand-Straße 30 63911 Klingenberg/Germany Tel. +49 9372 132-0 Fax +49 9372 132-406 info@wika.de www.wika.de

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