Introduction

Oil scrubbing has long been a universally accepted method of cleaning intake air for engines, compressors and blowers. No other method affords such high efficiency with the added features of extended operation without attention, small space requirements and overall economy. The LP Oil Bath is a second generation design which functions with extremely low pressure loss and requires no external power for operation. Advanced features are employed throughout for ease of operation and maintenance.

LP Oil Bath Filters offer highly efficient dust arrestance – up to 98% SAC Fine test dust and for the most severe environments an optional integrally mounted pre-cleaner is available to remove up to 70% of incoming dirt particles without contamination of the oil reservoir. Intervals between services are therefore greatly increased. The unusually large oil sump for extra dirt holding capacity, plus its lower pressure loss give the LP unique advantages in protecting air using equipment from dirt.

Special features

	Low pressure loss
	Serviceable whilst operating
	No external power required
	Extended Service intervals
	Optional pre-cleaner
	Inspection/cleaning port
	Sump drain valve
	Removable oil sump
	High efficiency
	p gauge and alarm switch

For mobile applications an LP oil bath filter with anti-spillage features can be provided.

Air outlet configurations are available for a variety of applications, vertical top outlet with mating flange bored to requirements is standard. Side outlet hoods with special flanges, are available on request.

For steady flow conditions consult the selection chart inside, for pulsating flows consult our engineers.

How it operates

Dirt laden air enters under the weather hood at (A) and through the perforated guard (B). Under normal conditions of airflow approx. 20% of the air passes across the oil control pan (C) and beneath the air deflector skirt, (D) where it lifts oil droplets from the control ports (E), and carries the oil into scrubbing chamber (F). The remainder of the air passes directly upwards through the ports (G) arranged peripherally around the bottom of the oil scrubbing chamber where it is directed tangentially by the flexible port covers (H) and forms a rotating air mass that is thoroughly scrubbed by the oil present. Deflector plates (J), then intercept most the dirty oil droplets and guide them to the centre oil return tube (K), which drains the oil and dirt into the sump (L). A portion of the oil is also deposited on the walls of the scrubbing chamber, drains down to the port plate and is re-entrained by the incoming air stream to supplement the scrubbing action. Sufficient oil is carried into the metal mesh filter/separator element (M) to provide adequate adhesive properties to maintain high filtration efficiency on fine dust particles and to continually flush collected dirt from the element. This dirty oil also returns to the sump through the oil return tube. Acting both as an efficient filter media and liquid separator, the filter element permits only clean, oil free air to enter the air using equipment.

Servicing

An optional airflow restriction gauge and alarm switch provide an immediate indication of the condition of the filter element. An oil level gauge permits observation of the oil/sludge level when the equipment is shut down. Collected sludge is removed by simply lowering the oil sump even whilst the filter is operating. For major overhaul cleaning ports on the top of the filter permit back flushing of the filter element without removal of the intake ducting. If necessary the element can be removed from the top for attention. (See LP Oil Bath Air Filter Types LP and LP-PC Installation, Operation and Maintenance Instructions Brochure).

LP-PC

An LP Oil Bath Filter with integrally mounted Pre-cleaner designated LP-PC is available, It is dimensionally identical to the standard filter but pressure loss indicated above is increased by 20%.