Magnetic Horizontal Level Switches For Hazardous areas
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Technical Datasheet Magnetic Horizontal Level Switches For Hazardous areas Key Features  Operates in almost every liquid at high pressure or temperature Tough, rugged design for long life in aggressive environments Magnetically coupled No glands or linkages that could cause leaks Series Overview Product applications Pump control duty Interface duty Can be fitted to Zone 0 vessels with process temperatures up to 400°C. Other products Other products we can offer : • Vertical level switches How can we help you? Delta Mobrey offers fast, efficient and knowledgeable support when and where you need it. Please visit our website at www.delta-mobrey.com to find your local support centre or call us on: +44 (0)1252 729140 Page 1 of 15 Model: Hazardous areas When the process liquid level is below the switch point, contacts B-B are made and contacts A-A are open, but if the liquid level is above the switch point, contacts A-A are made and contacts B-B are open. Magnetic Horizontal Level Switches The Mobrey magnetic horizontal float switch is ideal for high and low liquid level alarm, and pump control duties. It is designed to open or close a circuit as a changing liquid level within a v

How to order Instrument can be configured by selecting codes representing the desired features from the tables that follow. The chart below, describes how the model code is built up. For assistance in configuring a switch that best suits your needs, please contact your local sales office. S Base Model Table 1 Flange (head) Table 2 Switch Mechanism Table 3 Model: Hazardous areas Magnetic Horizontal Level Switches

Horizontal float switch Flameproof Zone 1, stainless steel wetside, Mobrey ‘G’ flange, 304.5 psi (21 bar) 752 °F (400 °C) Flameproof Zone 1, gunmetal wetside, Mobrey ‘G’ flange, 304.5 psi (21 bar) Flameproof Zone 1, stainless steel wetside, 3 in. ASME B16.5 Class 150 RF flange Flameproof Zone 1, stainless steel wetside, 4 in. ASME B16.5 Class 150 RF flange Flameproof Zone 1, stainless steel wetside, 6 in. ASME B16.5 Class 150 RF flange Flameproof Zone 1, stainless steel wetside, 3 in. ASME B16.5 Class 300 RF flange Flameproof Zone 1, stainless steel wetside, 4 in. ASME B16.5 Class 300 RF...

Description Electrical: 2 independent Single Pole Single Throw (SPST) contact sets As type D but with gold plated contacts Electrical: 2 independent circuits of Double Pole Double Throw (DPDT) contact sets 752 °F (400 °C) As type D6 but with gold plated contacts As type D6 but with gold plated contacts and hermetically sealed moving parts Switch Enclosure Aluminium alloy Aluminium alloy, low ambient temperatures –4 to –76 °F (–20 to –60 °C) Gunmetal, low ambient temperatures –4 to –76 °F (–20 to –60 °C) Float (All ratings at T room) (7) Switch type General purpose high/low alarm, 316 SST,...

Vertical pump control or alarm, 316 SST, rod length 4570mm, 435 psi (30 bar) Cranked arm, horizontal, 316 SST, dimensions to be specified, 500 psi (34.5 bar) Cranked arm, vertical, 316 SST, dimensions to be specified, 500 psi (34.5 bar) General purpose high/low alarm, Alloy 400, min. SG 0.65, 500 psi (34.5 bar) General purpose high/low alarm, 316 SST, min. SG 0.60, 1073 psi (74 bar) General purpose high/low alarm, 316 SST, min. SG 0.45, 500 psi (34.5 bar) General purpose high/low alarm, 316 SST, min. SG 0.51, 1073 psi (74 bar) General purpose high/low alarm, 316 SST, min. SG 0.71, 2900 psi...

Float switch specifications Table 6. Float Switch Specification - Hazardous Area Applications General Enclosure/Housing materials Aluminium alloy to BS 1490: grade LM24, nickel-plated. All external aluminium surfaces are chromate phosphate treated, and then externally stove painted Gunmetal to BS1400: LG2 Nickel-plated finish IP rating Wetside material 316 Stainless steel to Mobrey Standard (316S33 Stainless steel for S260 and S261 switches) Gunmetal to BS1400: LG2 Back flange (excludes S250 and S275) Carbon steel to BS 1501: 224 Grade 430B LT50 Maximum process temperatures Aluminium...

TDS-MHLSH-C: MAY 2023 Table 7. Electrical switch mechanism specification Electrical type D and P Electrical switch mechanism Type D For alternative make and break circuits Function: 2 independent Single Pole Single Throw contacts sets and “snap-action” May be wired S.P.C.O. on site For switching two independent circuits Function Double Pole change over (2 independent circuits) and “snap-action” As type D and D6 but with Gold Plated Contacts for switching low power (e.g. Intrinsically Safe) electrical circuits For use in corrosive area and/or low temperature applications As type D6 but with...

TDS-MHLSH-C: MAY 2023 Table 8. Electrical switch mechanism specifications Electrical switch specification Contact material Fine silver Gold plated Gold plated Process temperature Ambient temperature Insulation value D and P: M4 screws with non-rotational clamp plates. D6 and P6, : 6-way terminal block with pressure plates Electrical specification Power factor 0.4, minimum Time constant 40 ms, maximum Maximum power 1. Maximum current for Type D is 8 A up to 410°F (210°C). Warning The plating of gold contacts may be permanently damaged when used to switch circuits above the following limits:...

TDS-MHLSH-C: MAY 2023 The graphs below show the maximum allowable working pressure of our float assemblies and process connection flanges across their working temperature range. Pressure/Temperature Relationships Stainless Steel Wetside Switches 200 150 F107 MOBREY "A" (GENERAL PURPOSE) F264 (MONEL) F68, F84, F98, F104 MOBREY "A" (HOSEPROOF/SUBMERSIBLE) TEMPERATURE (°C) F93 WORKING PRESSURE: LIMITED TO ATMOSPHERIC UP TO 180°C Non-Ferrous Wetside Switches Model: Hazardous areas Magnetic Horizontal Level Switches TEMPERATURE (°C) ALUMINIUM BRONZE WETSIDE SWITCHES GUNMETAL WETSIDE SWITCHES F93...

TDS-MHLSH-C: MAY 2023 Table 9. Float dimensions X, Y, and Z hazardous area Float Float Type Float Material 1. Refer to pages 11, 12, 13 and 14 for technical float details and length op ons. See “Nozzle and stud lengths” below for stud lengths. Nozzle and stud lengths Table 10. Maximum Length in mm (Dimension L) F185 F88 F93 See figure 4 on page 15 for companion flanges and accessories. L (See Table 10) Minimum stud projection (See Table 11) Horizontal F68 pump control and alarm float Note: Dimensions are in inches (mm). Note Switches fitted with the F68/+ type float may be adjusted on site...