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P&I diagram

Pipe and instrumentation diagram

Panel filter

Filter mats

Panel filter

Flat, rectangular filter element

Particle filter

see dust filter

Particle filter class

see filter class

Particle size distribution

cf. grain size distribution

Parts in contact with gas

Components in the gas stream

Peak cleaning

Additional cleaning at raw gas side with horizontal filter elements above the filter element.

Pendulum flap

Discharge flap

Permissible for food

Materials and items that are determined to get in touch with food.

Pharma filter

Umbrella term for filter plants especially designed for pharmaceutical productionharmazeutische Produktion designte Filteranlagen

Pilot filter

Pilot filter for process testing

Plan filter

Predominantly flat depth-loading filter

Pleated filter element

Pleated, flat filter element

Pocket filter

Flexible filter medium that is formed to a flat pocket (sewn or welded)

Pocket filter plant

Filter plant with pocket filter elements

Point filter

Filter system that is positioned direct above a conveyor system or machine.lb einer Förderanlage oder Maschine positionierte Filteranlage

Pollutants

colloquial: harmful substances and mixtures in the environment.

Polyester

Universal filter medium

Pore

Very small opening

Pore density

Amount of pores per surface unit

post cleaning

Cleaning after switch off of a filter

Powder

Dry, very fine milled solid.

Pre-separator

Additional pre-separating stage with integrated or upstream filter.

Precoating

Prefilter

Filter stage with low separating capacity for protection of a second filter stage.

Pressure compensating filter

Dust filter without fan for reduction of inner pressures in devices of all kinds.

Pressure loss

see differential pressure

Pressure relief

see discharge valve

Pressure resistance

Constructive resistance of a filter plant.

Pressure shock resistance

Constructive resistance of a filter plant.

Pressure tank

Closed vessels, whose internal pressure is above the ambient pressure.

Preventive explosion protection

Measurements that prevent ignition of dangerous explosive atmosphere by eliminating of at least one explosion conditions

Principle of partial load

Special explosion protection principle considering the ratio between raw and clean gas volume of a filter plant Besonderes Explosionsschutzprinzip unter Berücksichtigung des Verhältnisses zwischen Roh- und Reingasvolumen einer Filteranlage

Process dedusting

cf. dedusting plant

Process filter

Filter systems that are completely integrated in a production process.

Product recovery

Return of the separated dust to a procuction process.

Product separating filter

Filter with product recovery

Product-wetted components

Components with contact to dust

Proximity switch

Initiator for reporting operating conditions

PTFE

Polytetrafluorethylene

Pulse duration

Opening time of the cleaning valve