Series 500-e, Cast iron & 316ss pvc & kynar – Pump Solutions Group Neptune Series 500 MODEL 481 THRU 547 User Manual

Page 28

CAST IRON
&
316SS

PVC & KYNAR

APPENDIX

Addendum to Operating and Instruction Manual for the 500 dia-pump and 500-A dia-pump

This sheet describes the differences in liquid head design of the Series 500-E “dia-pump”. This sheet is intended to
be used with the Operating and Instruction Manual for Neptune Series 500 and 500-A “Dia-Pumps”.

The Series 500-E Pumps are identical to the Series 500-A except for an economy liquid head. All parts of the
instruction manual relating to Series 500-A are applicable to 500-E except for liquid head parts and valve
instructions. The 500-E liquid head consists of: (1) liquid head casting, (1) back-up plate (on metal head models
only), and (2) valve cartridges. The valve cartridges are replaced as a unit; they cannot be disassembled.

The following parts are unique to Series 500-E Models:

DESCRIPTION QTY

CODE N1

CAST IRON

Part #

CODE N3

316SS

Part #

CODE N5

PVC

Part 3

CODE N8

KYNAR

Part 3

Pump

Head

003277 003276 003278 003326

Valve Cartridge Suction

003321

003279

003322

Back-Up Plate

000195

Valve Cartridge Discharge

003321

003279

003332

Complete Spare Parts Kit*

003385

003386

003387

*Includes suction and discharge valve cartridges, diaphragm and all o-rings.

NOTE: PRIMING PROCEDURE
Series 500-E pumps have no anti-siphon spring to defeat when priming, they also do not have a valve cap to vent and bleed air.
To bleed air on initial start-up it will be necessary to open a valve to the atmosphere in the discharge line before the first isolation
valve. If there is no valve in the particular installation, then breaking the piping connection at tubing joint or union will allow the air
to escape while the pump is primed. This is only required when first starting a new installation. Since there is no anti-siphon
spring, it is necessary to install a backpressure valve in the line when pumping to atmospheric or low-pressure injection points.

Valve cartridges remove as one piece. Apply pipe dope or Teflon paste to threads to reinstall.

SERIES 500-E

“dia-pump” INSTRUCTIONS