SHURflo NG7V User manual

Please read and save this Repair Parts Manual. Read this manual and the General Operating Instructions carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. The Safety Instructions are contained in the
General Operating Instructions. Failure to comply with the safety instructions accompanying this product could result in personal injury and/or property
damage! Retain instructions for future reference.
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual Models NG7V, NG11V, NG7V-PH and NG11V-PH
Refer to form L-4082 for General Operating and Safety Instructions.
Form L-4092 (3/10)
SHURflo Commercial-Duty Filter and Rendering Oil
Rotary Close-Coupled External Gear Pumps
Description
SHURflo self-priming, positive displacement, external gear, hot oil pumps feature cast-iron construction, with Viton
mechanical seal for high temperature use. This series of non-clogging pumps are highly recommended for high flow waste oil
rendering because they are able to pass small non-abrasive particles and reduce oil shear. Features include heavy-duty stainless
steel helical non-corrosive gears for quiet and long-life pumping action, carbon graphite bushings and ball bearing drive for
continuous use, with a stainless steel adjustable pressure relief valve as standard equipment. This series of pumps can also be
used for hot oil or frying oil filtration up to 375° F., meeting NSF-listing requirements. Pumps are configured with motors
specifically for hot oil applications where oil is heated prior to pumping and discharge pressure limitations do not exceed
50 PSI with supplied motors. They provide a nearly pulseless flow in applications where small or non-particulate and non-
abrasive fluids are pumped. AC ODP single-phase motors have thermal overload protection. Complete package is easy to
install, or optional pump heads only can be purchased for custom installations.
Uses: Ideal for a wide range of commercial fat fryer hot oil cooking, filtering, or waste oil rendering applications. This pump
can also be used in non-NSF hot oil applications with non-particulate and non-abrasive fluids compatible with pump wet-end
construction component materials. Not for use with water-based fluids.
•Pumps meet NSF-listed standards including NSF-accepted paint for hot oil cooking applications.
•Pumps can operate bi-directionally (reverse operation should be used intermittently).
•Pressures to 125 PSI with pump heads.
•Pressures to 50 PSI, maximum viscosity of 100 SSU and maximum specific gravity of 1.1 with configured motors.
•Flows to 10.8 GPM.
•Operating temperatures to 375° F.
•Maximum viscosity of 1000 SSU and maximum specific gravity of 1.1 with pump heads and optional motors at 1725 RPM,
and viscosities up to 100,000 SSU at reduced motor speeds.
•Suction lift capabilities up to 12.3 feet of head.
•Maximum RPM: 1725.
•Stainless steel adjustable pressure relief valve standard.
•Port size: 1/2" and/or 3/4".
•ODP single-phase 56C frame motors with 1/2 or 3/4 HP with thermal overload protection.
•416 SS helical gear set for handling high viscosity fluids and low oil shear.
•303 SS drive shaft and idler shaft with carbon graphite bushings and a ball bearing drive.
•Seal flush ports for handling fluids of viscosities greater than 2000 SSU.
•Maximum case pressure of 200 PSI.
Wet-end parts are constructed from cast iron, steel, stainless steel (303, 17-7, 18-8, 416, 15-7MO), carbon, graphite, Type 1
Ni-Resist, and Viton.
Optional Close-Coupled Gear Speed Reducers are available that mount directly between pump and motor to reduce pump speed
for high viscosity or high specific gravity applications (See Appendix 1).
WARNING: Do not use to pump flammable or explosive fluids such as gasoline, fuel oil, kerosene, etc. Do not use in flammable and/or
explosive atmospheres. When pumping hazardous or dangerous materials, use only in room or area designated for that purpose. For
your protection, always wear proper clothing, eye protection, etc. in case of any malfunction. For proper handling techniques and cautions,
contact your chemical supplier, insurance company and local agencies (fire dept., etc.). Failure to comply with this warning could result in
personal injury and/or property damage.
COMPONENT

SHURflo Commercial-Duty Filter and Rendering Oil
Rotary Close-Coupled External Gear Pumps
2
Models NG7V, NG11V, NG7V-PH and NG11V-PH
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4092 (3/10)
Model Ordering Codes and Options
Example Model: NG7V
(1) (2) (3) (4)
NG 7 V
NG: Motor Mounting
(NSF Cast Iron Gear
Pump with Viton Seals)
7: 7 GPM (1/2") / 1/2 HP
11: 10.8 GPM (3/4") / 3/4 HP
V: Pressure
Relief Valve
1st 2nd 3rd 4th
Mounting Pump Size (Ports)/AC Motor Options
-PH: Pump Head Only
(no motor)
NOTE: Not all order code combinations (configurations) are standard models available from the manufacturer. Custom model configura-
tions may require ordering standard components and/or optional parts that will need to be assembled by the customer.
Manufacturer reserves the right to change model order codes, standard models, specifications, and performance without notification.
Maximum motor speed is 1725 RPM.
Cast iron is not for use with water-based fluids.
NOTE: 1725 RPM ODP motor
Stainless Steel Helical Gears
Stainless Steel
Helical Gears
COMPONENT

3
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)
Performance
Max. Input GPM Pumping Cooking Oil at 300° F
Models Port Size* RPM Torque in.-lbs. Suction Lift (ft)** Free Flow 25 PSI 50 PSI***
Pumps with Motors
NG7V 1/2" 1725 90 7.9 7.0 6.9 6.8
NG11V 3/4" 1725 90 12.3 10.8 10.7 10.6
Pumps without Motors
NG7V-PH 1/2" 1725 90 7.9 7.0 6.9 6.8
NG11V-PH 3/4" 1725 90 12.3 10.8 10.7 10.6
Test data taken on cooking oil at 300° F. Do not use with water.
Pump performance when pump is new. As pump wears, the performance will decrease.
(*) Female NPT inlet and outlet (in inches).
(**) Suction lift requires wetted gears and primed seal chamber.
(***) Max. PSI = 50 based on HP of motors supplied (rating may vary based on application; check motor amps on start-up).
NOTES:Consult tables in form L-4082 (General Operating and Safety Instructions) on HP adders and speed recommendations for
high viscosity fluids.
Pumps with motors are HP rated to handle up to 50 SSU at 50 PSI and specific gravity of 1.0.
Max. Viscosity = 100 SSU at 1725 RPM with the motor supplied.
Max. Input Torque = See chart above.
Max. RPM = 1725
Max. Specific Gravity = 1.1 at 50 PSI, up to 1.6 at lower PSI & viscosity.
Reverse Rotation = Pumps can be run in reverse rotation. Pressure relief valve will only function if installed on the discharge
side of the pump. For continuous reverse rotation, gears need to be reversed and pump head cover rotated 180°.
Flush porting is required beyond 2000 SSU.
Pump heads with optional motors can pump to 1000 SSU at 1725 RPM.
Pumping greater than 1000 SSU requires reduced motor speeds. Max. viscosity is 100,000 SSU at reduced speeds.
Manufacturer reserves the right to change performance without notification.

SHURflo Commercial-Duty Filter and Rendering Oil
Rotary Close-Coupled External Gear Pumps
4
Models NG7V, NG11V, NG7V-PH and NG11V-PH
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4092 (3/10)
PUMP CONSTRUCTION (Wet End)
AC Thermal Pump Body/Adapter Pressure Ship
Motor Motor NEMA Motor Overload Motor Shaft Motor Port & Cover Helical Shaft Bushing Relief Seal & Wt.
Model HP Type Frame Voltage Amps PH HZ Protection** RPM Size Shaft *** Castings Gears **** Material Valve†O-Rings* (lbs.)
Models with Motors
NG7V 1/2 ODP 56C 115/208-230 7.2/3.5-3.6 1 50/60 Yes 1450/1725 5/8 Spline 5/8 Keyed 1/2 CI 416 SS 303 SS CG Steel & SS Viton 28
NG11V 3/4 ODP 56C 115/208-230 10.6/5.2-5.3 1 50/60 Yes 1450/1725 5/8 Spline 5/8 Keyed 3/4 CI 416 SS 303 SS CG Steel & SS Viton 37
Models without Motors
NG7V-PH - - - - - - - - - 5/8 Spline - 1/2 CI 416 SS 303 SS CG Steel & SS Viton 8
NG11V-PH- - - - - - - - - 5/8 Spline - 3/4 CI 416 SS 303 SS CG Steel & SS Viton 11
CG = Carbon Graphite SS = Stainless Steel CI = Cast Iron ODP = Open Drip-Proof
(*) Standard Shaft Seals have carbon on Type 1 Ni-Resist faces and 18-8 SS components.
(**) Manual or Automatic (check motor supplied).
(***) NPT inlet and outlet (in inches).
(****) Retaining rings on drive and idler shafts are 15-7 MO SS.
(†) Models are made of steel and stainless steel (17-7, 303 and/or 18-8).
N
NO OT TE ES S:Driver data is subject to change without notice, see label on driver for actual specifications.
All motors include a base (the base may be removable, movable or welded). Motors are not supplied with power cords.
Manufacturer reserves the right to change specifications without notification.
Standard motors listed above are not wash-down or explosion-proof (manufacturer does not stock wash-down or explosion-proof motors).
Thermal overload protection is standard on all single-phase motors (overload protector may have automatic or manual reset).
Manufacturer does not specify regulatory compliance for UL, UR, CSA or CE; however most models do comply to UL, UR, CSA and CE.
Specifications

5
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)
Dimensions
Port Dimensions (in inches)
Model A* B C** D E**
Models with Motors
NG7V 1/2 6.33 21.25 11.76 8.37
NG11V 3/4 6.51 22.50 12.13 9.25
Models without Motors
NG7V-PH 1/2 6.33 - 11.76 -
NG11V-PH 3/4 6.51 -12.13 -
(*) Female NPT inlet and outlet (in inches).
(**) This dimension may vary due to motor manufacturer’s specifications.
NOTE: Dimensions have a tolerance of (+ or -) 1/8".
Manufacturer reserves the right to change dimensions without notification.
All dimensions in inches unless otherwise specified.
Dimensions
Figure 1 — Dimensions
Pressure
Relief
Valve
Gear Part Numbers and Dimensions (in inches)
Ref. Description Part Outer Gear Hole
No. Number Diameter Length Diameter Material
1 Gear-Helical (R.H.) 23291 1.75 0.75 0.625 416 SS
Gear-Helical (L.H.) 23292 1.75 0.75 0.625 416 SS
2Gear-Helical (R.H.) 23124 1.75 1.25 0.625 416 SS
Gear-Helical (L.H.) 23125 1.75 1.25 0.625 416 SS
NOTE: All dimensions in inches.
SS = Stainless Steel
Gears should always be replaced as a set (See Gear Kits in Repair Parts).
Kit requires one left and one right gear.
Manufacturer reserves the right to change dimensions without notification.
Port Width

SHURflo Commercial-Duty Filter and Rendering Oil
Rotary Close-Coupled External Gear Pumps
6
Models NG7V, NG11V, NG7V-PH and NG11V-PH
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4092 (3/10)
Check motor.
It may be equipped
with an automatic resetting thermal
protector and may restart unexpectedly
(see specifications chart). Protector tripping
is an indication of motor overloading as a
result of operating the pump at too high a
pressure (over 50 PSI), too high of viscosity,
too high of specific gravity, excessively high
or low voltage, inadequate wiring, incorrect
motor connections, too small a motor
(sized incorrectly, not enough HP),
or a defective motor or pump.
Do not handle pump with wet hands or
when standing in water. Failure to follow the
General Safety Information and all warnings
could result in fatal electrical shock!
Installation
IMPORTANT: In any installations where
property damage and/or personal
injury can occur when the pump is
not operating due to power outages,
discharge line freezing, or any other
reason, a back-up system(s) and/or
warning system(s) should be used.
In order to safely use this product,
familiarize yourself with this pump and
also with the liquid (chemical, etc.) that
is going to be pumped through the
unit. This pump is not suitable for
many liquids.
If pump is purchased separately from
motor, refer to “Pump Motor or Drive
Coupler Replacement” section on
page 11 for instructions on mounting
pump to motor.
1. Locate the pump as close to the
liquid source as possible, making
the suction line as short and direct
as possible.
PIPING
SUCTION
2.Avoid excessive lengths or number of
fittings and bends in the suction line.
3. Attach suction line to suction inlet.
4. It is recommended that same size
pipe as pump ports be used or, in
cases requiring lengthy piping, the
next larger size pipe be used.
5.If suction lift is greater than what is
indicated in the performance chart,
attach a foot valve below liquid
level at end of suction line to ensure
positive priming. Also note: If fluid
specific gravity is greater than 1.4 or
viscosity greater than 500 SSU, a
foot valve is also recommended.
(100 SSU max. and 1.1 specific
gravity max. with standard motor.)
NOTE: If a foot valve (or check valve) is
not used in the suction line, it may be
necessary to refill the pump every time
the unit is stopped and you wish to
restart the pump. This depends on the
length of time between starts and
whether or not the gears are wet
enough to close cavities to affect a prime.
6. If solid contaminates are suspected
in a liquid, place a filter in the
suction line.
7. Be certain all suction piping
connections are airtight.
NOTE: Assure airtight pipe connections
with the use of a pipe joint sealant.
DISCHARGE
8. Attach discharge piping to the
discharge outlet.
Support pump and
piping during assembly
and after installation. Failure to do so may
cause piping to break, pump to fail, motor
bearing failures, etc., all of which can result in
property damage and/or personal injury.
NOTE: Should the pump need to be
self-draining, the pump head should be
mounted in the vertical position with
the suction port facing down. When
pumping high viscosity fluids, the
vertical position can be used with the
suction port facing up and the pump
mounted under the source. Increasing
the suction pipe size and eliminating
bends and elbows also assists in pump-
ing high viscosity fluids. Max. viscosity is
1000 SSU at 1725 RPM. (100 SSU Max.
with standard motor.)
9. If a shut-off valve or handgun is
required in discharge line, make
sure the pressure relief valve for
pump protection is positioned on
pump discharge port side.
Shutting off discharge
without providing
pressure relief can cause extreme over-
pressure which can result in pump and/or
motor failure. Do not exceed 50 PSI pump or
system pressure on standard models.
10. Operation under shut-off discharge
conditions will overheat and
damage pump.
NOTE: Globe valves or other restrictive
valves should not be used as shut-off
mechanism as they are restrictive in
nature and will seriously affect pump
performance.
11. After all piping and controls (not
supplied with unit) have been
installed, unit is ready for operation.
Operation
Do not run pump
dry, as permanent
damage to the pump gears, seal, and
bearings will result. Suction pressure should
never be greater than the discharge pressure.
1. All pumps must be primed before
start-up and the seal chamber needs
to be filled (See Figure 2). Never
operate a pump unless it is secured
to a solid foundation and all safety
shields are installed.
Upon start-up, maintain a minimum
of 15 PSI (1 BAR) operating pressure
on the pump. This will allow any
Figure 2 - Seal Chamber Priming
Remove plug and
fill seal chamber
with fluid and
reinstall plug

7
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)
remaining air to be driven from the
seal chamber and will ensure liquid
circulation to the mechanical seal.
2. Gear pumps are built to very close
tolerances and this tolerance must
not be altered. The liquids must,
therefore, be free of all abrasives.
Sand, silt, wettable powders, etc.
must be avoided.
NOTE: Cast iron pumps are for oil-based
fluids only.
3. When pumping a more viscous
(beyond 100 SSU on standard mod-
ules) liquid; a slower speed, a larger
pipe size pump, and possibly a
larger motor should be selected.
NOTE: See performance chart for Max.
Torque.
4. Recheck motor and pump rotation.
Proper pump rotation is clockwise
(CW) looking at the front of the
pump when pressure relief valve
is installed by manufacturer
(See Figure 1).
5. On all standard models, pressure
relief valve is always on discharge
side (See Figure 1).
PRESSURE RELIEF VALVE
6. Standard model rotary gear pumps
are supplied with a built-in internal
pressure relief valve (can be exter-
nally ported). The valve may be
adjusted and used to set system
operating pressure, or used as a
system pressure relief valve to
prevent pump and motor damage
that can occur when discharge line
is closed off. This relief valve is not
factory set. Extended operation
(over one minute) under shut-off
conditions could cause pump to
overheat, leak, and damage itself
or overload motor.
7. To increase the pressure relief valve
pressure setting, remove cap (See
Figure 3 & 13, Ref. No. 31), then
loosen lock nut (See Figure 13, Ref.
No. 36), then turn the set screw
(See Figure 13, Ref. No. 32) in
(clockwise). Turning the set screw
out (counterclockwise) will reduce
the pressure setting. When desired
pressure is achieved, tighten lock
nut and reinstall protective cap (See
Figure 3).
8. The pressure relief valve can be
converted to an external relief. This
will allow the relief to dump back
to tank and allow longer periods of
relief without pump damage.
However, this is not a full-line
pressure relief valve, and in cases
where frequent extended pressure
relief valve operation is anticipated, a
full-line external pressure relief valve
should be piped in the discharge line
and connected either back to the
tank or well down-stream of the
pump suction inlet (See Figure 4).
9. To convert the pressure relief valve
to external relief, remove the NPT
pipe plug from the pump cover
(See Figure 13, Ref. No. 35) and
discard. This plug is next to the
pressure relief valve. In the bottom
of the NPT hole, there is a second
drilled and tapped hole. An
optional external bypass plug (See
Figure 13, Ref. No. 38 included)
should be inserted in this hole and
bottomed out. The open NPT port
must now be piped back to the tank
or well downstream of the pump
suction (See Figure 4).
10. Standard models are equipped with
pressure relief valves, and the pump
can be run in reverse, however,
the pressure relief valve will not
function. For continuous reverse
rotation, the cover plate must be
rotated 180˚ and gears reversed
(See Figure 13). This is accomplished
by removing the eight cover plate
screws, rotating the cover plate,
and reattaching the screws. The
pressure relief valve should now
be on the opposite side. This will
allow operation of the pump with
a functioning pressure relief valve
in reverse rotation. See Maintenance
Pump Repair section for disassembly
and reassembly instructions.
MECHANICAL SEAL FLUSH
INSTALLATION OPTIONS
11. These pumps are equipped with
mechanical seals and have been
designed with flush ports because
mechanical seals require cooling
lubrication for long life.
a. For fluids with viscosities less than
2000 SSU, a flush is not necessary,
but the seal cavity must be pre-
filled with either the operating
fluid or a neutral fluid. This is to
ensure seal cooling and lubrication
during start-up (See Figure 2).
Failure to provide
initial seal prime can
result in the mechanical seal overheating
with resulting repair costs.
Figure 3 - Pressure Relief Valve Adjustment
Loosen valve lock nut and adjust
pressure with adjustment screw
and tighten lock nut again.
Cap
Figure 4 - External Pressure
Relief Valve Installation
Remove external bypass
plug cover and discard.
then insert external bypass
relief plug as shown.

Operation (Continued)
b. A flush must be provided for
fluids with a viscosity of greater
than 2000 SSU. The seal must be
cooled and lubricated by a fluid.
In the case of high viscosity fluids,
due to the precision clearances
between the gear teeth and the
body, highly viscous fluids will not
be able to adequately relieve the
air in the seal cavity on start-up.
The dry running of a mechanical
seal will cause rapid failure.
Pumping fluids with
viscosities greater than
2000 SSU requires flushing the seal chamber
during operation, otherwise seal damage
will occur.
EXTERNAL FLUSH
An external flush system is typically
recommended for applications where
crystallization build-up on the seal is
possible. Some dilution of the working
material must be acceptable to use an
external flush system.
The external flush system (See Figure 5
for typical installation) is commonly
used with liquids where city water can
be used as the neutral flush fluid. City
water is taken from an external source
such as a tap, hose, or special plumbing
fixture and is regulated into the seal
cavity by means of a needle valve and
flowmeter. Use of an anti-siphon check
valve is required.
It is essential that an
anti-siphon check
valve be installed between the pump and
the city water supply to prevent any back
flow from possibly contaminating the city
water supply. Failure to do so could result in
contamination of the water supply with con-
sequential damages. Manufacturer assumes
no responsibility for failure of user in not
providing safeguards to city water systems.
Step 1: Locate appropriate city water
supply and install anti-siphon check
valve.
Step 2: Use appropriate pipe nipple to
reduce piping to 1/8”.
Step 3: Install appropriate needle valve
and flowmeter.
Step 4: Connect piping to one of three
available seal flush ports on pump.
Step 5: Adjust needle valve to achieve
desired flow to seal cavity (recommend-
ed 1 to 3 GPH).
INTERNAL FLUSH
Similar to above but internal supply
(See Figure 6 for typical installation).
Typically recommended for high viscosity
applications ensuring lubrication to the
mechanical seal.
In an internal flush system, the fluid is
taken from the discharge and regulated
from 1 to 3 GPH (Gallons Per Hour) to
the seal cavity by means of a flowmeter
and needle valve.
Step 1: Select a T pipe coupling that is
consistent with discharge pipe size and
material. Couple to discharge piping.
Step 2: From this coupling, attach a
needle valve with appropriate nipple
reducing to 1/8” pipe or tube. Install
appropriate flowmeter.
Step 3: Connect 1/8” pipe or tube to
one of three available seal cavity
flush ports.
Step 4: Adjust needle valve to desired
flow into seal cavity (recommended
1 to 3 GPH).
For alternate flush
systems for hazardous
fluid applications, hot liquid transfer, and
those not addressed in this booklet, consult
a qualified fluid handling specialist for
assistance in specifying and installing flush
systems according to local, state and federal
environmental laws.
SHURflo Commercial-Duty Filter and Rendering Oil
Rotary Close-Coupled External Gear Pumps
8
Models NG7V, NG11V, NG7V-PH and NG11V-PH
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4092 (3/10)
Figure 6 - Internal Flush
Figure 5 - External Flush

Figure 8 - Shaft and Seal Assembly Figure 9 - Seal Types and Parts Identification
9
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)
GEAR SPEED REDUCER OPTIONS
A gear reducer can be directly mounted
between a standard pump and motor
combination. Gear speed reducers are
available for applications with high
specific gravity, or when viscosities are
greater than 100 SSU, using a standard
1725 RPM motor (See Appendix 1). The
pump relationship between volume
(GPM), pressure (PSI), speed (RPM),
viscosity, specific gravity and horsepow-
er is shown on performance chart in
Shurflo Motor Manual form L-4082.
12. Unit is ready for operation.
Maintenance
Make certain that
the power source is
disconnected before attempting to service or
disassemble any components!
If the power disconnect is out of sight, lock
it in the open position and tag to prevent
application of power.
CLEANING
Clean the suction line filter at regular
intervals.
ELECTRIC MOTOR (IF SUPPLIED)
Properly selected and installed, electric
motors are capable of operating for
years with minimal maintenance.
Periodically clean dirt accumulations
from open-type motors, especially in
and around vent openings, preferably
by vacuuming (avoid imbedding dirt in
windings). Oil and maintain as recom-
mended by motor manufacturer.
GENERAL
Periodically check that electrical connec-
tions are tight. Pump should be drained
if placed in an area that is subject to
freezing temperatures and/or lubricated
with fluid compatible with pump.
PUMP REPAIR
DISASSEMBLY
(Refer to Figure 13 for Reference
Numbers and Figures 8 & 9 for detailed
seal and shaft assemblies.)
1. Pump Removal from Motor
a. Remove four bolts (Ref. No. 20)
from pump body (Ref. No. 19) and
gently pull pump assembly from
motor.
b. Pump drive coupler does not
need to be removed from motor
unless motor needs to be
replaced. (If so, refer to Pump and
Motor Drive Coupler Replacement
on page 11.)
2. Gear and Shaft Assembly Removal
a. Remove cover plate (Ref. No. 34)
(held by eight screws, Ref. No. 1)
and o-ring gasket (Ref. No. 2).
Gently tap cover plate with
rubber mallet to free it from
dowel pins. Once cover is removed,
the idler shaft and gear assembly
can be pulled out of pump body
(Ref. No. 19).
b. Remove the idler gear (Ref. No. 4)
from the shaft (Ref. No. 24)
by removing retaining rings
(Ref. No. 15), then slide gears
off the shaft end (Ref. No. 4).
c. The drive gear (Ref. No 3) can be
pulled out. Before drive shaft
(Ref. No. 5) can be removed from
body (Ref. No. 19), remove
woodruff key (Ref. No. 25) by
gently tapping key with drift pin.
(Do not damage key or keyway
upon removal.)
NOTE: The gears are helical gears. It is
important that the correct “twist” of
the gear is installed in the drive pocket
versus the idler pocket for efficient
directional operation. Reverse gears for
reverse pump operation.
Figure 7 - Right-hand Helix Gear is drive
gear for standard clockwise rotation when
facing the front of the pump.
Idler Gear
Left-hand Helix
Drive Gear
Right-hand Helix
Type 1
Ni-Resist Seat
with O-ring
Mechanical Seal
with Seal, Spring & Retainer
(three loose pieces)
One-piece Mechanical
Seal with thru boot
Type 1 Ni-Resist Seal
with Rubber Cup
Polished face always
goes against carbon
face of seal
Retaining Ring
Internal
Retaining Rings
(Carbon Steel)
SS Retaining Ring
Ball Bearing
O-Ring
Retainer
Seal Seat
Mechanical Seal

SHURflo Commercial-Duty Filter and Rendering Oil
Rotary Close-Coupled External Gear Pumps
10
Maintenance (Continued)
3. From the drive shaft end of the
gear pump, remove the internal
snap ring (Ref. No. 11) from the
body (Ref. No. 19). The drive
assembly, which consists of the drive
shaft (Ref. No. 5), seal assembly
(Ref. Nos. 7 & 8), seat retainer (Ref.
No. 9), bearing (Ref. No. 10) and
retaining rings (Ref. No. 16 & 23),
can now be removed from the unit
(See Figure 8).
NOTE: The retaining rings (Ref. No. 16
and 23) look alike but are made of
different materials. Make sure you
identify them properly.
The bearing (Ref. No. 10), seat
retainer (Ref. No. 9) and seal (Ref.
No. 7) can also be removed (pushed
or pulled) from the shaft (Ref. No.
5). Also remove the internal o-ring
(Ref. No. 17) from the body (Ref.
No. 19). Disassembly is now
complete.
4. Inspect pump for wear on pump
body, gear, shafts, bushings (bushing
replacement is not recommended),
bearings and cover. If any compo-
nents are worn, consider replacing
the complete pump. Complete pump
heads can be found on Figure 13.
REASSEMBLY
(Refer to Figure 13 for Reference
Numbers and Figures 8 & 9 for detailed
seal and shaft assemblies.)
1. Shaft/Seal Assembly
a.Install inside o-ring (Ref. No. 17)
into body (Ref. No. 19). Lubricate
with light oil.
b. There are two possible types of
seals. One style, the seal is one
piece while the other style has a
seal boot, spring and spring
retainer (See Figure 9). Refer to
assembling components on drive
shaft (See Figure 8). When
installing the seal on the shaft,
wet with water and be cautious
when sliding it into position.
NOTE: If drive shaft has scratches
or rough spots where seal will be
positioned, replace shaft. Prior to
sliding the seal in place, remove any
rough spots on shaft near key retainer
ring slots.
The spring retaining washer and
spring are behind the seal with the
carbon facing towards the splined
end of drive shaft.
c. The seal seats can also be of two
styles; one has a rubber boot and
the other has an o-ring. Identify
which type you have (See Figure
9). Press seal seat into the seal
retainer (See Figures 8 & 9) using
water as a lubricant. The white
shiny Type 1 Ni-Resist face should
be visible after pressing the seal
to the seal retainer. It is recom-
mended to use a cardboard wash-
er or wood dowel when pushing
the seal seat into the seal seat
retainer. Any scratches, dirt, or
fingerprints on the carbon or
Type 1 Ni-Resist faces will cause
the seal to leak. The seal seat is
stationary in the pump, while the
seal on the shaft rotates. The car-
bon face spinning against the
Type 1 Ni-Resist face provides for
the sealing surface.
d. Slide the seal retainer onto
the drive shaft holding seal
onto the shaft.
e. Slide the drive shaft assembly
(Ref. Nos. 7,8,9,10,16 & 23) into
the gear pump and secure with
the internal retaining ring (Ref.
No. 11). (Also see Figure 8.)
2. Gear and Shaft Installation
a. Replace the woodruff key (Ref.
No. 25) into the drive shaft (Ref.
No. 5) using soft jaw pliers, or
protect the shaft with rubber
while pressing the key in place. Be
sure that the key is level and that
the key and shaft are free of burrs
and scratches.
b. The drive gear (Ref. No. 3) can
be dropped in place and must be
free to float on the shaft. Do not
force the drive gear onto the
shaft. For standard clockwise
rotation, the drive gear should be
the right-hand twist helical gear
(See Figure 7).
c. The idler gear (Ref. No. 4) is
placed on the idler shaft (Ref. No.
24) over the woodruff key and
secured by the two external
retaining rings (Ref. No. 15).
d. Slide idler gear and shaft assembly
into pump body (Ref. No. 19),
rotating gear to get gears to
mesh.
e. Ensure that the pump body (Ref.
No. 19) and cover (Ref. No. 34)
mating surfaces are clear of debris
and are dry.
Place new, clean and dry o-ring
gasket into the groove on the
pump body.
Any foreign or liquid
material on the gasket
or the gasket surfaces will increase the space
between the gears and the cover, and sub-
stantially reduce pump performance.
f. Slide cover over dowel pins (Ref.
No. 21).
NOTE: Position cover (Ref. No. 1) with
pressure relief valve on the discharge
side of the pump—for clockwise rota-
tion, this is the right side of the pump
(See Figure 1). If the pump is to be run
in reverse direction, rotate cover (Ref.
No. 1) 180° so that the relief valve is on
the discharge side. Ensure that the
gears are installed for proper direction
as well (See Figure 7).
The drive shaft assembly will
require slight compression as
cover is tightened. Replace and
tighten cover screws. Alternate
from top to bottom and side to
side while tightening screws.
Torque cover screws to 50 in.-lbs.
g. Reinstall pump to motor, see
“Reassembly” section on this page.
Models NG7V, NG11V, NG7V-PH and NG11V-PH
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4092 (3/10)

11
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)
Figure 11 - Type A Motor Shaft Coupler Figure 12 - Type B Motor Shaft Coupler
h. If drive coupler or motor need
replacing, see “Pump Motor or
Drive Coupler Replacement”
section on this page.
3. All pumps must be primed before
start-up and the seal chamber needs
to be filled (See Figure 2).
PRESSURE RELIEF VALVE
DISASSEMBLY AND REASSEMBLY
1. (Refer to Figure 13.) Remove thread-
ed cap (Ref. No. 31) and loosen lock
nut (Ref. No. 36) on pressure relief
valve adjustment screw (Ref. No. 32)
and rotate clockwise (CW) 1-2 turns
to pressure relief valve spring retain-
er (Ref. No. 29).
2. Unscrew and remove adjustment
screw (Ref. No. 32), locknut (Ref. No.
36) and fiber washer (Ref. No. 26) by
rotating counterclockwise (CCW).
3. Unscrew valve end cap (Ref. No. 30)
and o-ring (Ref. No. 37) by rotating
counterclockwise (CCW).
4. Remove valve piston (Ref. No. 28),
spring retainer (Ref. No. 29), valve
spring (Ref. No. 27), cover and/or valve
end cap and o-ring (Ref. No. 33), .
5. Unscrew pipe plug (Ref. No. 35) by
rotating counterclockwise (CCW).
Inspection of pressure relief valve
components should include piston for
wear and erosion, the spring and the
o-rings for degradation. Components
should be cleaned of accumulated build-
up of solid matter. The pressure relief
valve cover (Ref. No. 34) needs to be
inspected for wear on the piston
pressure relief valve seat, the cover face
and the bushing pockets. Replace any
parts if worn.
To reassemble, reverse the disassembly
steps above.
6. All pumps must be primed before
start-up and the seal chamber needs
to be filled (See Figure 2).
PUMP MOTOR OR DRIVE COUPLER
REPLACEMENT
1. The pump comes with a spline
coupler. The coupler could be of
two types. (See Figures 11 & 12 to
identify coupler type.)
2. Apply anti-seize compound to the
entire length of the motor shaft and
drive coupling spline teeth.
3. Align the keyways of motor shaft
and coupling, then install the key
(See Figures 10, 11 and 12). Slide the
drive coupling onto the motor shaft
as far as it will go.
4. Install the set screws into the
coupler and tighten the set screws
securing the coupler, key and motor
shaft together.
5. The coupling is now ready for final
pump motor assembly.
6. Make sure the splines are coated
with anti-seize compound or grease.
Slide the male spline shaft on the
pump head into the female spline
now mounted on the motor shaft.
7. Secure the pump to the motor with
four bolts.
8. The unit is ready for operation.
9. All pumps must be primed before
start-up and the seal chamber needs
to be filled (See Figure 2).The pump
head will pivot on the motor.
Do not run pump
dry, as permanent
damage to the pump gears, seal, and
bearings will result. Suction pressure should
never be greater than the discharge pressure.
Figure 10 - Installing the Spline Coupler

12
Models NG7V, NG11V, NG7V-PH and NG11V-PH
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Figure 13 – Repair Parts Illustration
Please provide following information:
-Model number
-Serial number (if any)
-Part description and number
as shown in parts list
To order parts, contact a SHURflo Distributor or Order Direct.
Distributors can be found at www.shurfloindustrial.com.
Form L-4092 (3/10)

13
Repair Parts List
Ref. Included Part No. For Model:
No. In Kit Description NG7V NG11V NG7V-PH NG11V-PH Qty.
1Screw - Fillister Head NA NA NA NA 8
2 1, 2 O-Ring - Viton NA NA NA NA 1
3 1 Gear-Helical (R.H.) - 416 SS (See kit.) NA NA NA NA 1
4 1 Gear-Helical (L.H) - 416 SS (See kit.) NA NA NA NA 1
5 Shaft-Drive - 303 SS 23293 22800 23293 22800 1
6 Plug-Pipe - Steel 23182 23182 23182 23182 1
**7/8 Seal/Seat Assy. - Viton 22850S 22850S 22850S 22850S 1
9 Retainer - YZD 21864 21864 21864 21864 1
10 Bearing 4257 4257 4257 4257 1
11 Retaining Ring 4259 4259 4259 4259 1
12 Set Screw - Steel 22161 22161 22161 22161 2
13 Key 21943 21943 21943 21943 1
14 Bushing - CG 21333 21333 21333 21333 3
15 1Retaining Ring - Idler Shaft - 15-7 Mo. SS 12840 12840 12840 12840 2
16 Retaining Ring - Drive Shaft - Carbon Steel 5328 5328 5328 5328 2
17 O-Ring - Viton 23359 23359 23359 23359 1
18 Drive Coupling - spline 22802 22802 22802 22802 1
19 Body-Gear Pump - CI NA NA NA NA 1
20 Hex Head Screw NA NA NA NA 4
21 Dowel Pin NA NA NA NA 2
22 *Motor (See Specifications.) 24878S 24876S NA NA 1
23 Retaining Ring - 15-7 Mo. SS 12582 12582 12582 12582 1
24 Shaft - 303 SS 21307 21313 21307 21313 1
25 1 Key - Woodruff 4432 12841 21307 21313 2
26 2 Washer (Fiber) 22507 22507 22507 22507 1
27 2 Spring - 17-7 SS 4354 4354 4354 4354 1
28 2 Piston - Relief Valve - 303 SS NA NA NA NA 1
29 Spring Retainer - 17-4 SS 21422 21422 21422 21422 1
30 Cap - Relief Valve - Steel 23416 23416 23416 23416 1
31 Cap - Threaded 23415 23415 23415 23415 1
32 Screw - Pressure Relief - 18-8 SS 23414 23414 23414 23414 1
33 2O-Ring - Viton NA NA NA NA 1
34 Cover - CI 23290 23290 23290 23290 1
Optional Optional Non-Relief Cover 23004S 23004S 23004S 23004S 1
35 Pipe Plug 21419 21419 21419 21419 1
36 Nut - Jam 23413 23413 23413 23413 1
37 2 O-Ring - Viton NA NA NA NA 1
38 Set Screw External Relief Valve - 17-4 SS 21709 21709 21709 21709 1
(not installed at factory)
2, 3, 4, 15 & 25 Kit 1 - Gear Kit 24780 24781 24780 24781
2, 26, 27, 28, 33 & 37 Kit 2 - Relief Valve Kit 24782 24782 24782 24782
Complete Pump Heads* NG7V-PH NG11V-PH NG7V-PH NG11V-PH
(*) Motor specifications are found in the motor specifications chart in this manual.
(**) Mech. seal and seat sold as set only (Ref. Nos. 7&8) – carbon Type 1 Ni-Resist faces with 18-8 SS components.
NOTES: SS = Stainless Steel CI = Cast Iron CG = Carbon Graphite YZD = Yellow Zinc Dichromate
Optional Close-Coupled Gear Speed Reducers are available (See Appendix 1).
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)

14
Appendix 1 - Optional C-Flanged Pump Speed Gear Reducers
Model Number Description L* M* RPM Out** Ship Weight (Ibs.)
AGR56C600 Gear Reducer, 56C to 56C, 3.0 ratio 5.177 1.675 583 21
AGR56C900 Gear Reducer, 56C to 56C, 2.0 ratio 5.177 1.675 875 21
AGR56C1200 Gear Reducer, 56C to 56C, 1.5 ratio 5.177 1.675 1167 21
(*) L dimension (in inches) is length of the gear reducer. M dimension (in inches) is the offset of the reducer output centerline from the motor
centerline. All reducers may be rotated in 90° increments, changing the orientation of the offset from top to side to bottom.
(**) Based on 1750 RPM motor speed.
GEAR SPEED REDUCER OPTIONS
A gear reducer can be directly mounted
between a standard pump and motor
combination. Gear speed reducers are
available for applications with high
specific gravity, or when viscosities are
greater than 1000 SSU, using a standard
1725 RPM motor. The pump relation-
ship between volume (GPM), pressure
(PSI), speed (RPM), viscosity, specific
gravity and horsepower is shown on
performance chart in Shurflo Motor
Manual form L-4082.
Disassemble Pump From Motor and
Insert Gear Reducer Gear Reducer Installed between Pump and Motor
(References L and M are dimensions in chart above.)
Models NG7V, NG11V, NG7V-PH and NG11V-PH
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
SHURflo Commercial-Duty Filter and Rendering Oil
Rotary Close-Coupled External Gear Pumps
Form L-4092 (3/10)

SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
15
Notes
Form L-4092 (3/10)

SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
SHURflo warrants to the original purchaser of its products (the “Purchaser”) that such products will be free from defects in
material and workmanship under normal use for the period of one (1) year, and accessories will be free from defects in
material and workmanship under normal use for the period of ninety (90) days.
“Normal use” does not include use in excess of recommended maximum speeds, pressures, vacuums and temperatures, or
use requiring handling of fluids not compatible with component materials. This warranty does not cover freight damage,
freezing damage, normal wear and tear, or damage caused by misapplication, fault, negligence, alterations, or repair that
affects the performance or reliability of the product.
THIS WARRANTY IS EXCLUSIVE. SHURflo MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
SHURflo’s obligation under this warranty is, at SHURflo’s option, to either repair or replace the product upon return of the
entire product to the SHURflo factory in accordance with the return procedures set forth below. THIS IS THE EXCLUSIVE
REMEDY FOR ANY BREACH OF WARRANTY.
IN NO EVENT SHALL SHURflo BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND, WHETHER FOR
BREACH OF ANY WARRANTY, FOR NEGLIGENCE, ON THE BASIS OF STRICT LIABILITY, OR OTHERWISE.
Only authorized distributors can return products for Warranty. Contact your distributor or visit www.shurfloindustrial.com
to find a distributor for product support.
Distributors can obtain an RMA # and contact person’s name by contacting SHURflo’s customer service at 800-854-3218
(Ext. 6788 or Ext. 6651).
Return Procedures for Distributors
All pumps or products must be flushed of any chemical (ref. OSHA Section 0910.1200 (d)(e)(f)(g)(h) and hazardous chemicals
must be labeled before being shipped* to SHURflo for service or warranty consideration. SHURflo reserves the right to
request a Material Safety Data sheet from the Purchaser for any pump or product SHURflo deems necessary. SHURflo reserves
the right to “disposition as scrap” pumps or products returned which contain unknown substances, or to charge for any and
all costs incurred for chemical testing and proper disposal of components containing unknown substances. SHURflo requests
this in order to protect the environment and personnel from the hazards of handling unknown substances.
Be prepared to give SHURflo full details of the problem, including the following information:
1. Model number, purchase date and from whom you purchased your pump.
2. A brief description of the pump problem, including the following:
• Liquid pumped. State the pH and any non-soluble • Drive type (gas engine/electric motor; direct/belt drive;
materials, and give the generic or trade name. tractor PTO) and rpm of pump.
• Temperature of the liquid and ambient environment. • Viscosity (of oil, or other than water weight liquid).
• Suction lift or vacuum (measured at the pump). • Elevation from the pump to the discharge point.
• Discharge pressure. • Size and material of suction and discharge line.
• Size, type, and mesh of the suction strainer.
SHURflo may request additional information, and may require a sketch to illustrate the problem. Distributors should contact
the factory to receive a return material authorization before sending the product. All pumps returned for warranty work
should be sent shipping charges prepaid to:
[RMA# and Contact Person]
SHURflo
375 Fifth Avenue NW
New Brighton, Minnesota 55112
*Carriers, including U.S.P
.S., airlines, UPS, ground freight, etc., require specific identification of any hazardous materials being shipped.
Failure to do so may result in a substantial fine and/or prison term. Check with your shipping company for specific instructions.
Limited Warranty on SHURflo Commercial-Duty Filter
and Rendering Oil Rotary External Gear Pumps
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)
Printed in USA
FLOW TECHNOLOGIES GROUP
5900 Katella Ave. • Cypress, CA 90630
Phone: [phone] • [phone] • Fax: [phone]
www.shurfloindustrial.com
www.shurfloindustrial.com