Murphy BLSK1 Series dimensions Description, Specifications, Dimensions

Bilge Level Switch System

BLSK-95107B

Revised 10-03

Catalog Section 15

(00-02-0052)

(1)BLSK1 Series

■Operates Bilge Pumps or Alarms

■Uses Proven “Air Cell” Actuated System

■Remote Switch and Moving Parts Kept Unaffected by Corrosion

(2)

■ Aluminum Body and Cover

■ Includes 3 Assemblies:

(1) BLS1 Bilge Level Switch

Description

The BLSK1 Bilge Level Switch System gives you all items and fittings necessary to install in your bilge. Or, you can have only the parts you want and you provide brackets, tubing and mount- ing hardware.

Using the proven “Air Cell” actuating system, all moving parts and switching are remote from bilge liquids and are thus not affected by corrosion, rust, etc. All wetted parts are of non-corrosive materials.

As bilge level rises a column of air is captured in the MAC1 Air Volume Cell. The rising bilge level compresses the column of air creating pres- sure against the large diaphragm in the BLS1 Bilge Level Switch and the switch trips. Switch set point is adjustable.

The switch resets as the bilge is pumped out. Air cell recharges itself during normal operation.

The BLS1 is constructed of materials not affected by marine atmospheres; Aluminum or Bronze body and cover, Buna-N diaphragm.

Specifications

BLS1 Bilge Level Switch

Snap-Switch SPDT (standard)

•5 A @ 125, 250, or 480 VAC

•1/2 A @ 125 VDC, 1/4 A @ 250 VDC NOTE: A pilot relay may be used for higher contact ratings (see Typical Wiring Diagram).

(2) MACT1 Tube Kit (Sensor Line and Fittings)

(3)(3) MAC1 “Air Cell” (Volume Cell)

Case/Lid: Aluminum (std).	Dimensions
Bottom Plate: Glass-filled Nylon.	5-1/2 in.
Process Connection: 1/4 NPTF.	(140 mm)	BLS1
		(Bilge
Max. Pressure: 25 psi (172 kPa) [1.72 bar].		Level
Conduit Connection (electrical): 1/2 NPT.	6-5/32 in.	Switch)
	(156 mm)
BLS1 Weight: 3 lb. (1.4 kg).
BLS1 Dimensions: 6-1/4 x 6-1/4 x 6-1/4 in.	1/2 NPT for electrical
(159 x 159 x 159 mm).	connections
15050737 Optional mounting bracket	MACT1 Tube Kit
16 ga., 304 stainless steel (see Dimensions).	(Sensor Line)
	4 feet long
MACT1 Tube Kit (fittings included)	(1.21 m) std.
	MAC1
4 ft. (1.21 m) flexible non-corrosive
	(Volume Cell)
tubing, 1/4 in. (6 mm) dia. (cut to fit).
MACT1 Weight: 0.5 lb. (0.23 kg).
MACT1 Dimensions: 6 x 6 x 6 in. (152 x 152	1/4-20 hex bolt	3-1/4 in.
x 152 mm).	(2-places) and nuts	(83 mm)
MAC1 Air Cell (Volume Cell)	5-3/16 in.
• Made of non-corrosive materials	(132 mm)
• (2) 1/4-20 stainless steel hex bolts and nuts.	Optional Mounting Bracket (15050737)
MAC1 Weight: 2 lb. (1 kg).	2-3/8 in.	9/32 in. (7 mm) dia.
MAC1 Dimensions: 6 x 6 x 6 in. (152 x 152	(60 mm)	4-places
x 152 mm).		1-1/2 in.
		(38 mm)