Mobrey Dual Control

Introduction:

Industrial Water Level Controls are Magnetically operated Controls, Vertical Type in Float Chambers, meant for external Mounting on Steam Boilers/Vessels/Tanks and are designed to meet such requirements of Controls as Automatic on/off Control of Feed Pump, High and / Low Level Alarm, Burner cut out or any combination of these. These are mounted with independent Steam and Water connections with isolating valves and normally mounted vertically close to the Boiler Gauge Glasses.

Operation:

A permanent Magnet of the Float Rod Slides vertically inside a non-magnetic centre Tube and transfers the movement of the Float to secondary Magnet in each Switch Unit. Self holding Switch Units,located on vertical support Rods in proximity to the Centre Tube and positioned by Clamp Screws, have 2 pairs of contacts operated with a snap action and held by repulsion between the secondary and Tertiary Magnets of the Switch Unit Assembly.

The Switch Units have S.P.D.T. Contacts having the following Current carrying capacity.

AC (25 to 60 c.p.s.)	DC inductive Loads
Power Factor 1 to 0.4	Time Constant L/H = 40 miilisec. max.
4A at 110V	0.25A at 50V
2A at 250V	0.17A at 110V.
1A to 440V

Each Switch Unit will incorporated a four way Terminal Block. The Switch Head will have two Conduit entries.

Adjustments: The Switch Head incorporates two/three/Four sets of Switch Units and "Differential" in operation between the sets are adjustable. Version:

i) Side and Bottom Version with ends to 1" NB, BS 10, Table 'H' suitable for a maximum operating Pressure of 250psig (17.5 kg/cm2) of Steam.

ii) Side and Side Version with ends to 1" NB, BS to Table 'H' suitable for a maximum operating Pressure of 250 psi-(17.5 kg/cm2) of Steam.

iii) Side and Side Version with ends to 1" NB, BS 10 Table/ANSl B 16.5, -150, 300 and 600 LBS Ratings, suitable for related operating pressures of steam, with Centre to Centre distance of Flanges at 216mm / 340 mm / 400mm / 4550 mm etc. suiting customers requirements.

Warranty: Products guaranteed for 12 months from date of supply against defective workmanship.

Specifications:

CTC 200, 216, 300, 400, 450 or As per Requirement Switch Head 2, 3 ,4 Switches Float SS-304, SS-316L and Monel K 400 Process Connection BS-10 Table 'J' BS-10 Table 'H' ANSI CL -300 ANSI CL-600 Din Standard