Bailey & Mackey Visual Setting Switches 1391

Description

Visual Setting Switches are particularly useful in situations where the frequent alteration of the pressure setting is
required. The Dial enables you to visually see the current set point of the switch along with enabling easy
adjustment.
 Accurate visual setting scale
 One or Two independently operating
Micro-switches depending on type
 External adjustment
 Scale calibrated to +/- 2% of range
 IP65 Enclosure Rating
 CE Marked
 Easily Customised
 Diaphragm Operated ≤ 42 bar
 Piston Operated > 42 bar
 LPCB Approved

Mechanical Specifications

Pressures
Type No.           Pressure Ranges
1391 & 2391     0 to 1 bar Vacuum
1391 & 2391     0 to 1 bar
1391 & 2391     0.2 to 4 bar
1391 & 2391     0.5 to 10 bar
1391 & 2391     2 to 30 bar
1391 & 2391     2 to 40 bar
1491 & 2491     5 to 125 mbar
1491 & 2491    15 to 250 mbar
1491 & 2491    25 to 400 mbar
1591 & 2591    9 to 100 bar
1591 & 2591    14 to 200 bar
1591 & 2591    20 to 400 bar

Standard Materials (1391, 1491, 2391 & 2491)
Diaphragm          Beryllium Copper
Seal                       Glass filled PTFE ≤ 11 Bar
Nitrile                  Rubber >11 Bar
Housing              Aluminium/Zinc Diecast
Cover                   Glass filled Nylon with Neoprene seal
Base                     Brass

Electrical Ratings
10 Amp at 250V ac 50Hz Inductive Load
1 Amp at 30V dc Inductive Load

Maximum Pressure
To ensure long service and life select the pressure range as follows:
Dynamic pressure applications Pmax = 75% of Range
Static pressure applications Pmax = 100% of Range
Maximum Pressure that can be applied is 125% of pressure range
Installation
The Switches can be mounted directly on the connecting thread. Sealing grooves are machined into the end
face of the parallel threads for the use with sealing washers. A mounting bracket is available if required.
Vacuum Setting
At ambient pressure the switches will be in the operated condition, consequently the wiring should be
reversed i.e NO becomes NC.
Connecting Threads
All connecting threads used in industry are available including British, American and Metric. Please state
required connection thread when ordering.
Flanged fittings are available and all types of Hygienic Fittings can be supplied assembled directly onto the
Pressure Switch. If flush diaphragms are required please consult our Technical Sales Department.

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