Sandpiper ST1 User Manual

st1dl5sm-rev0717
www.sa n dpiper p ump.co m
Model ST1/ST25 • 6
Recommended Installation Guide Filling the Driver Chambers with Liquid
THE DRIVER CHAMBERS WILL BE
FILLED WITH DISTILLED WATER AT
THE FACTORY.
If you need to substitute another liquid to prevent
system contamination, rst consult the factory for
chemical compatibility with pump construction.
Follow the steps listed below to replace the liquid
in the pump after disassembly or liquid loss:
Step 1. Filling is accomplished through the
pipe plugs at the top of the liquid chamber. Drain
ports are at the bottom of the liquid chamber.
Step 2. After the driver fluid has been
emptied from the pump, the driver
diaphragms will naturally come to center.
Step 3. Remove the entire manifold assembly
exposing the ports in the outer diaphragm
chambers.
Step 4. For pumps not equipped with Visual
Leak Detection sight tubes, ll with 722ml/ 24.6
. oz.
For pumps equipped with Visual Leak Detection
sight tubes, ll with 752ml/ 25.4 . oz.
It is imperative that the driver liquid chambers
be lled with the correct amount of driver liquid
as too little or too much will cause premature
diaphragm failure and erratic pumping.
Step 5. After lling with the proper amount of
liquid, if the liquid does not come to the top of
the ll hole, pressure should be applied to the
PTFE diaphragm with a blunt tool through the
material ow port in the outer chamber until the
liquid comes to the top. If the main air valve body
and pilot valve are removed, the diaphragm rod
will be visible in the intermediate bracket. The
hole in the diaphragm rod will assist manual
movement. Use a long taper punch to move the
diaphragm rod.
Step 6. When the driver uid rises to the top
of the ll plug hole, apply pipe dope to the pipe
plug, and thread it into the chamber plug hole.
(Do not use PTFE tape.) Keep pressure on the
PTFE diaphragm until the pipe plug is tight to
prevent air from drawing
back into the chamber.
Step 7. Repeat the filling procedure for
opposite side.
2: INSTAL & OP

Sandpiper ST1 Specifications

General

Brand	Sandpiper
Model	ST1
Category	Water Pump
Language	English