VI Dismantling and Repair, Comments | Saint Gobain Vidros PFS1

PFD1/PFS1 – OPERATING INSTRUCTIONS

If the pump starts, check that the following was not the cause:

∙The air/nitrogen connections (See III.3.1),

∙The air/nitrogen quality,

∙Has the pump been serviced correctly? (See V.2 Preventive maintenance).

Before dismantling the pump check the following:

∙The air/nitrogen supply is “OFF”,

∙The chemical and discharge lines are empty and there is no pressure,

∙All in line valves are closed,

∙You follow your local Health and Safety Regulations with regard to particular chemicals.

V.2 – Preventive Maintenance

V.2.1 – Continuous Operation

When the pump is used continuously, it is necessary to replace the following parts every year:

∙	Shaft composite rings	P/N 7135F
∙	Central shaft	P/N 2615

Important: these parts should always be replaced together.

During routine maintenance checks, examine the following parts and change them if necessary:

∙	Bellows	P/N 2613 (PFD) or 2613S (PFS)
∙	Shuttle valve	P/N 2701
∙	Viton bellow O.ring	P/N 2725
∙	Body O.ring	P/N 2739
∙	Manifold O.ring	P/N 2745
	Manifold O.ring	P/N 2745
∙	Lip seal	P/N 2711 (PFD) or 2711A (PFS)
∙	PTFE sleeves	P/N 7220
∙	Silencers	P/N 7185
∙	Ball valves	P/N 2712

V.2.2 – Intermittent operation

If the pump is used intermittently, it is advised to replace all wearing parts every 18 months (shaft composite rings and central shaft) and to check other parts (bellows, shuttle valve, lip seal...).

If the pump is left standing full of chemical for long periods all the Viton O.rings should be replaced.

V.3 – Comments

If the pump is used to pump hot chemicals in excess of 140°F (60°C) the preventive maintenance schedule time scale should be divided by 2:

∙Every 6 months check as for continuous operation,

∙Every 9 months check as for intermittent operation.

The above is based on SGPPL ASTI's experience.

SGPPL ASTI cannot be held responsible for premature failures if the pump is misused or damaged due to an incorrect application.