SANDPIPER ET1 1/2 - M User Manual

SERVICE AND OPERATING MANUAL

Original Instructions

ET1½ - M

CONTAINMENT DUTY Type 3

Table of Contents

Engineering Data, Temperature Limitations, & Performance Curve ...................... 1

Explanation of Pump Nomenclature ...................................................................... 1

Dimensions ............................................................................................................ 2

Principle of Operation ............................................................................................ 3

Installation and Start-Up ........................................................................................ 3

Air Supply .............................................................................................................. 4

Air Inlet & Priming .................................................................................................. 4

ESADS+Plus

®

:

Externally Serviceable Air Distribution System ................................ 4

Air Exhaust

Between Uses ....................................................................................................... 5

Check Valve Servicing ........................................................................................... 6

Diaphragm Servicing ............................................................................................. 6

Pilot Valve .............................................................................................................. 6

Pilot Valve Actuator ................................................................................................ 6

Service Instructions: Troubleshooting ................................................................... 7

Warranty ................................................................................................................ 7

Composite Repair Parts List ............................................................................... 8-9

Composite Repair Drawing.................................................................................. 10

Important Safety Information ............................................................................... 11

Material Codes .................................................................................................... 12

Declaration of Conformity - Machinery ................................................................ 13

................................................................................................................ 5

Warren Rupp, Inc. • A Unit of IDEX Corporation

800 N. Main St., Manseld, Ohio 44902 USA • Telephone [phone] • Fax [phone] • warrenrupp.com

Model ET11/2-M Type 3 Page 6 et15mdl3sm-rev0614

®

Quality System

Containment Duty

ISO9001 Certified

Environmental

Management System

ISO14001 Certified

SANDPIPER® Containment Duty Pumps: Sealless Safety

This pump is part of the Containment Duty Pumps. It is specially fitted with PTFE diaphragms as well as elastomeric or elastomeric/PTFE driver diaphragms. The liquid-filled spill
chambers provide an additional chemically-resistant barrier, should a pumpIng diaphragm fail. The containment duty design gives the pump user advanced warning of diaphragm
failure, before pumpage can damage the air valve or be released into the work environment. Two optional leak detectors available for this model:

The Containment Duty pumps offer many different levels of materials and spill monitoring devices designed to fit a variety of applications and budgets.

 • Electronic Leak Detector (115V) 032-043-000 • Electronic Leak Detector (220V) 032-043-000

(SANDPIPER

SANDPIPER® Model SANDPIPER® Model

et15mdl3sm-rev0614 Model ET11/2-M Type 3 Page 1

PTFE

PTFE

CONTAINMENT DUTY

0

° °

C

B

A

"

"

"

"

©Copyright 2006 Warren Rupp, Inc. All rights reserved. Specifications are subject to improvement without notice.

SANDPIPER® is a registered tradename of Warren Rupp, Inc.

Model ET11/2-M Type 3 Page 2 et15mdl3sm-rev0614

SERVICE AND OPERATING MANUAL

CONTAINMENT DUTY Type 3

PRINCIPLE OF OPERATION

This ball check valve pump is powered by compressed air and is a 1:1
pressure ratio design. It alternately pressurizes the inner side of one diaphragm
chamber, while simultaneously exhausting the other inner chamber. This causes the
diaphragms, which are connected by a common rod, to move endwise. Air pressure
is applied over the entire surface of the diaphragm, while liquid is discharged from
the opposite side. The diaphragm operates under a balanced condition during the
discharge stroke, which allows the unit to be operated at discharge heads over 200
feet (61 meters) of water head.

Since the diaphragms are connected by a common rod, secured by plates to the
center of the diaphragms, one diaphragm performs the discharge stroke, while the
other is pulled to perform the suction stroke in the opposite chamber.

For maximum diaphragm life, keep the pump as close to the liquid being pumped
as possible. Positive suction head in excess of 10 feet of liquid (3.048 meters) may
require a back pressure regulating device. This will maximize diaphragm life.

Alternate pressuring and exhausting of the diaphragm chamber is performed
by means of an externally mounted, pilot operated, four-way spool type air
distribution valve. When the spool shifts to one end of the valve body, inlet air pressure is
applied to one diaphragm chamber and the other diaphragm chamber exhausts.
When the spool shifts to the opposite end of the valve body, the porting of chambers
is reversed. The air distribution valve spool is moved by an internal pilot valve which
alternately pressurizes one side of the air distribution valve spool, while exhausting
the other side. The pilot valve is shifted at each end of the diaphragm stroke by the
diaphragm plate coming in contact with the end of the pilot valve spool. This pushes
it into position for shifting of the air distribution valve.

The chambers are manifolded together with a suction and discharge check valve
for each chamber, maintaining ow in one direction through the pump.

This SandPIPER pump differs from others in that it utilizes four diaphragms
instead of two. The two rod-connected diaphragms are the driver diaphragms,
and the other two (outermost) diaphragms are the actual pumping diaphragms.
Each driver diaphragm (of Neoprene or other elastomer), and the pumping
diaphragm (of TFE), are separated by a chamber lled with liquid which transmits the
reciprocating motion of the driver diaphragm to the pumping diaphragm. The
pumping diaphragms, create the alternating suction and discharge action to each
outer diaphragm chamber. The pumping diaphragms are the only ones in contact
with the liquid being pumped.

Original Instructions

ET1½ - M

INSTALLATION & START-UP

Locate the pump as close to the product being pumped as possible, keeping
suction line length and number of ttings to a minimum. Do not reduce line size.

For installations of rigid piping, short exible sections of hose should be installed
between pump and piping. This reduces vibration and strain to the piping system.
A Warren Rupp Tranquilizer
pulsation in ow.

This pump was tested at the factory prior to shipment and is ready for

operation. It is completely self-priming from a dry start for suction lifts of 10-15 feet

(9-14 meters) or less. For suction lifts exceeding 15 feet of liquid, ll the chambers
with liquid prior to priming.

®

surge suppressor is recommended to further reduce

et15mdl3sm-rev0614 Model ET11/2-M Type 3 Page 3

AIR SUPPLY

Air supply pressures cannot exceed 125 psi (8.61 bar). Connect the pump air inlet
(see Fig. 1) to an air supply of sufcient capacity and pressure required for desired
performance. When the air line is solid piping, use a short length of exible hose (not
less than ¾" [19mm] in diameter) between pump and piping to eliminate strain to pipes.

AIR INLET & PRIMING

For start-up, open an air valve approximately ½ to ¾ turn. After the unit primes, an air
valve can be opened to increase ow as desired. If opening the valve increases cycling
rate, but does not increase ow rate, cavitation has occurred, and the valve should be
closed slightly.

For the most efcient use of compressed air and the longest diaphragm life, throttle
the air inlet to the lowest cycling rate that does not reduce ow.

A NOTE ABOUT AIR VALVE LUBRICATION

The SandPIPER pump’s pilot valve and main air valve assemblies are designed
to operate WITHOUT lubrication. This is the preferred mode of operation. There may
be instances of personal preference, or poor quality air supplies when lubrication of
the compressed air supply is required. The pump air system will operate with properly
lubricated compressed air supplies. Proper lubrication of the compressed air supply
would entail the use of an air line lubricator (available from Warren Rupp) set to deliver
one drop of 10 wt., non-detergent oil for every 20 SCFM of air the pump consumed at its
point of operation. Consult the pump’s published Performance Curve to determine this.

It is important to remember to inspect the sleeve and spool set routinely. It should
move back and forth freely. This is most important when the air supply is lubricated. If a
lubricator is used, oil accumulation will, over time, collect any debris from the compressed
air. This can prevent the pump from operating properly.

Water in the compressed air supply can create problems such as icing or freezing
of the exhaust air causing the pump to cycle erratically, or stop operating. This can be
addressed by using a point of use air dryer (available from Warren Rupp) to supplement a
plant’s air drying equipment. This device will remove excess water from the compressed
air supply and alleviate the icing or freezing problem.

ESADS: EXTERNALLY SERVICEABLE AIR
DISTRIBUTION SYSTEM

Please refer to the exploded view drawing and parts list in the Service Manual
supplied with your pump. If you need replacement or additional copies, contact your
local Warren Rupp Distributor, or the Warren Rupp factory Literature Department at the
number shown below. To receive the correct manual, you must specify the MODEL and

TYPE information found on the name plate of the pump.

MODELS WITH 1" SUCTION/DISCHARGE OR LARGER, AND
NON-METAL CENTER SECTIONS

The main air valve sleeve and spool set is located in the valve body mounted on the
pump with four hex head capscrews. The valve body assembly is removed from the
pump by removing these four hex head capscrews.

With the valve body assembly off the pump, access to the sleeve and spool set is
made by removing a retaining ring (each end) securing the end cap on the valve body
assembly. With the end caps removed, slide the spool back and forth in the sleeve.
The spool is closely sized to the sleeve and must move freely to allow for proper pump
operation. An accumulation of oil, dirt or other contaminants from the pump’s air
supply, or from a failed diaphragm, may prevent the spool from moving freely. This can
cause the spool to stick in a position that prevents the pump from operating. If this is
the case, the sleeve and spool set should be removed from the valve body for cleaning
and further inspection.

Remove the spool from the sleeve. Using an arbor press or bench vise (with an
improvised mandrel), press the sleeve from the valve body. Take care not to damage
the sleeve. At this point, inspect the o-rings on the sleeve for nicks, tears or abrasions.
Damage of this sort could happen during assembly or servicing. A sheared or cut
o-ring can allow the pump’s compressed air supply to leak or bypass within the air
valve assembly, causing the pump to leak compressed air from the pump air exhaust
or not cycle properly. This is most noticeable at pump dead head or high discharge
pressure conditions. Replace any of these o-rings as required or set up a routine,

Model ET11/2-M Type 3 Page 4 et15mdl3sm-rev0614