Idex Pulsafeeder Pulsa 680, Инструкция по установке, эксплуатации и обслуживанию

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1.5 Hydraulic Bypass Valve
Any excess hydraulic pressure buildup within the pump compression chamber or chemical end due to
accidental valve closure or line stoppage is relieved through the hydraulic bypass valve. It blows off oil
under excess pressure ahead of the plunger back into the oil reservoir thus terminating the pumping action
and protecting the pump mechanism. Hydraulic bypass valves are factory set at full design pressure unless
specified differently by purchaser.
1.6 Pressure Relief Valve
A separate process relief valve should be installed in the process piping to protect piping and sensitive
process equipment.
1.7 Bleeder Valve
The function of this valve is to release any air or oil vapors from ahead of the piston and maintain a solid
hydraulic medium to transmit infinite movements of the piston to the diaphragm. In large piston models
where adequate oil movement exists, the bleed valve functions automatically weeping a minute quantity of
oil plus any air or vapor out of the hydraulic system. In small piston models where oil movement and
hydraulic instabilities are minimal a manual bleed valve is used.
Additional detail on the function of these valves will be given as applicable in the Operation, Maintenance
and Trouble Shooting Sections.
1.8 Reagent Head Assemblies
Flat diaphragm reagent head assemblies are available in several basic configurations. They are:
Figure No. 5 ¼” through 1 ½” piston metal reagent head and plastic diaphragm
Figure No. 6 ¼” through
5/8
” metal reagent head and metal diaphragm
Figure No. 7 ½” through 1 ½”, plastic reagent head and plastic diaphragm