nomad NTG25 TRANS-FLO User manual

OPERATION MANUAL
AIR-OPERATED •DOUBLE DIAPHRAGM •PUMPS
ALUMINUM Models
316 S.S. Models A JDA Global Company
1/14 rev. 3
NTG25 NOMAD TRANS-FLO™

CAUTION – SAFETY POINTS
NTG25 NOMAD TRANS-FLO™
TEMPERATURE LIMITS:
Neoprene -17.8°C to 93.3°C 0°F to 200°F
Buna-N -12.2°C to 82.2°C 10°F to 180°F
EPDM -51.1°C to 137.8°C -60°F to 280°F
Viton®-40°C to 176.7°C -40°F to 350°F
Santoprene®-40°C to 107.2°C -40°F to 225°F
Polyurethane 12.2°C to 65.6°C 10°F to 150°F
Hytrel®-28.9°C to 104.4°C -20°F to 220°F
PTFE 4.4°C to 104.4°C 40°F to 220°F
1
1. Review the NOMAD Chemical Field Guide
for all applications. The information
provided is the “best thinking available”
regarding chemical compatibility. The
guide however, does not provide a
recommendation.
2. Always wear safety glasses during pump
operation. A diaphragm rupture may force
liquid to exit via air exhaust.
3. Whenhandlingammableuids,prevent
static sparking by properly grounding
the pump.
4. Do not exceed 125 psig (8.6 bar).
5. Prior to maintenance, compressed air
line should be disconnected to allow air
pressure to bleed from pump.
6. Tighten all clamp bands and hardware
parts prior to installation. Fittings may
loosen during transportation.

PUMP DESIGNATION SYSTEM
NTG25 NOMAD TRANS-FLO™
MATERIAL CODES
MODEL
NTG25 = 25MM (1")
WETTED PARTS &
OUTER PISTON
AA = ALUMINUM / ALUMINUM
S = 316 S.S.
AIR CHAMBERS
P = POLYPROPYLENE
(CENTER SECTION)
A = ALUMINUM
CENTER BLOCK
P = POLYPROPYLENE
A = ALUMINUM
AIR VALVE
B = BRASS
DIAPHRAGMS
BN = BUNA-N (Red Dot)
FS = HYTREL
ND = EPDM (Blue Dot)
NE = NEOPRENE (Green Dot)
SN = SANTOPRENE
TF = PTFE
VALVE BALL
BN = BUNA-N (Red Dot)
FS = HYTREL
ND = EPDM (Blue Dot)
NE = NEOPRENE (Green Dot)
TF = PTFE (White)
SN = SANTOPRENE
VALVE SEAT
A = ALUMINUM*
S = STAINLESS*
*Valve seat o-ring required.
VALVE SEAT O-RING
BN = BUNA-N
FS = HYTREL
ND = EPDM
NE = NEOPRENE
SN = SANTOPRENE
TF = PTFE
2
NTG25 / XXXX / XX / XX / X XX / X
MODEL
VALVE SEAT
O-RINGS
THREADED CONNECTION
VALVE BALLS
DIAPHRAGMS
AIR VALVE
CENTER BLOCK OR CENTER SECTION
AIR CHAMBERS OR CENTER SECTION
WETTED PARTS
SIZE
25 mm (1") Pump
Maximum Flow Rate:
133 lpm (35 gpm)

AIR OPERATED DOUBLE DIAPHRAGM PUMPS
FUNCTIONALITY AND FLOW PATTERN
Figure 1: Air valve directs
pressurized air to the back side
of diaphragm A. Compressed air
is applied directly to the liquid
column separated by elastomeric
diaphragms. The diaphragm
acts as a separation membrane
between the compressed air
and liquid, balancing the load
and removing mechanical
stress from the diaphragm. The
opposite diaphragm is pulled
in by the shaft connected to
the pressurized diaphragm.
Diaphragm B is on its suction
stroke; air behind the diaphragm
has been forced out to the
atmosphere through the exhaust
port of the pump. Atmospheric
pressure forces uid into the
inlet manifold forcing the inlet
valve ball o its seat. Liquid is
free to move past the inlet valve
ball and ll the liquid chamber
(see shaded area).
Figure 2: When the pressurized
diaphragm, diaphragm A,
reaches the limit of its discharge
stroke, the air valve redirects
pressurized air to the back
side of the diaphragm B. The
pressurized air forces diaphragm
B away from the center block
while pulling diaphragm A to
the center block. Diaphragm B
is now on its discharge stroke.
These same hydraulic forces
lift the discharge valve ball o
its seat, while the opposite
discharge valve ball is forced
ontoitsseat,forcinguidtoow
through the pump discharge.
Atmospheric pressure forces
uid into the inlet manifold of
the pump. The inlet valve ball is
forced o its seat allowing the
uid being pumped to ll the
liquid chamber.
Figure 3: At completion of
the stroke, the air valve again
redirects air to the back side
of diaphragm A, which starts
diaphragm B on its exhaust
stroke. As the pump reaches
its original starting point, each
diaphragm has gone through
one exhaust and one discharge
stroke. This constitutes one
complete pumping cycle. The
pump may take several cycles to
completely prime depending on
the conditions of the application.
NTG25 NOMAD TRANS-FLO™
3

DIMENSIONAL DRAWINGS
PERFORMANCE
NTG25 METAL
RUBBER-FITTED
NTG25 NOMAD TRANS-FLO™
4
Height............................................. 279 mm (11.0")
Width.............................................. 267 mm (10.5")
Depth ............................................... 185 mm (7.3")
Est. Ship Weight.................Aluminum 12 kg (26 lbs)
316 S.S. 11.34 kg (25 lbs)
Air Inlet.................................................6 mm (1/4")
Inlet....................................................... 25 mm (1")
Outlet .................................................19 mm (3/4")
Suction Lift .................................... 5.18 m Dry (17')
9.45 m Wet (31')
Displacement/Stroke ................. 0.41 l (0.105 gal.) 1
Max. Flow Rate ............................ 132 Ipm (35 gpm)
Max. Size Solids.................................3.2 mm (1/8")
1Displacement per stroke was calculated at 4.8 bar
(70 psig) air inlet pressure against a 2 bar (30 psig)
head pressure.
Example: To pump 68.1 lpm (18.0 gpm) against
a discharge pressure head of 2.7 bar (40 psig)
requires 4.1 bar (60 psig) and 18.7 Nm3/h (11 scfm)
air consumption. (See dot on chart.)
Caution: Do not exceed 8.6 bar (125 psig) air
supply pressure.
Flow rates indicated on chart were determined by pumping water.
For optimum life and performance, pumps should be specified so that daily operation parameters
will fall in the center of the pump performance curve.
DIMENSIONS
ITEM METRIC (mm) STANDARD (inch)
A 267 10.5
B 36 1.4
C 137 5.4
D 254 10.0
E 279 11.0
F 28 1.1
G 97 3.8
H 76 3.0
J 185 7.3
K 211 8.3
L 173 6.8
M 107 4.2
N 127 5.0
P 8 0.3
R 33 1.3
BSPT threads available.

SUGGESTED INSTALLATION
NTG25 NOMAD TRANS-FLO™
The suction pipe size should be at least 25mm
(1") diameter or larger if highly viscous
material is being pumped. The suction hose
must be non-collapsible, reinforced type as
the NTG25 is capable of pulling a high vacuum.
Discharge piping should be at least 19mm
(3/4"); larger diameter can be used to reduce
friction losses. It is critical that all ttings and
connections are airtight or a reduction or loss of pump
suction capability will result.
Every pump location should have an air line large
enough to supply the volume of air necessary to
achieve the desired pumping rate.
Unnecessary elbows, bends and ttings should be
avoided. Pipe sizes should be selected so as to keep
friction losses within practical limits. All piping should
be supported independently of the pump.
Expansion joints can be installed to aid in absorbing
the forces created by the natural reciprocating action
of the pump. Flexible connections between the pump
and rigid piping will also assist in minimizing pump
vibration. A surge suppressor should be installed to
protect the pump, piping and gauges from surges and
water hammer.
When pumps are installed in applications involving
ooded suction or suction head pressures, a gate
valve should be installed in the suction line to permit
closing of the line for pump service.
The NTG25 can be used in submersible applications
only when both wetted and non-wetted portions are
compatible with the material being pumped. If the
pump is to be used in a submersible application, a
hose should be attached to the pump’s air exhaust
and the exhaust air piped above the liquid level.
5
PERFORMANCE
NTG25 METAL
PTFE-FITTED
Flow rates indicated on chart were determined by pumping water.
For optimum life and performance, pumps should be specified so that daily operation parameters
will fall in the center of the pump performance curve.
Height............................................. 279 mm (11.0")
Width.............................................. 267 mm (10.5")
Depth ............................................... 185 mm (7.3")
Est. Ship Weight.................Aluminum 12 kg (26 lbs)
Air Inlet.................................................6 mm (1/4")
Inlet....................................................... 25 mm (1")
Outlet .................................................19 mm (3/4")
Suction Lift ...................................... 1.83 m Dry (6')
9.45 m Wet (31')
Displacement/Stroke ................. 0.19 l (0.050 gal.) 1
Max. Flow Rate .............................. 95 Ipm (25 gpm)
Max. Size Solids.................................3.2 mm (1/8")
1Displacement per stroke was calculated at 4.8 bar
(70 psig) air inlet pressure against a 2 bar (30 psig)
head pressure.
Example: To pump 45.4 lpm (12.0 gpm) against
a discharge pressure head of 2.7 bar (40 psig)
requires 4.1 bar (60 psig) and 21.1 Nm3/h (13 scfm)
air consumption. (See dot on chart.)
Caution: Do not exceed 8.6 bar (125 psig) air
supply pressure.

6
Note: In the event of a
powerfailure,theshuto
valve should be closed,
if the restarting of the pump
is not desirable once
power is regained.
TROUBLESHOOTING
NTG25 NOMAD TRANS-FLO™
Pump will not run or runs slowly.
1.Checkairinletscreenandairlterfordebris.
2.Checkforstickingairvalve,ushairvalve
in solvent.
3. Check for worn out air valve. If piston face in air
valve is shiny instead of dull, air valve is worn
beyond working tolerances and must
be replaced.
4. Check center block rings. If worn excessively, they
willnotsealandairwillsimplyowthroughpump
and out air exhaust.
5. Check type of lubricant being used.
ISO 15-5 wt. recommended.
Pump runs but little or no product ows.
1. Check for pump cavitation; slow pump speed
down to match thickness of material being
pumped.
2. Check for sticking ball valves. If material being
pumped is not compatible with pump elastomers,
swelling may occur.
3. Make sure all suction connections are
air tight.
Pump air valve freezes.
Check for excessive moisture in compressed air.
Air bubbles in pump discharge.
1. Check for ruptured diaphragm.
2. Check for tightness for clamp bands,
especially at intake manifold.
Product comes out air exhaust.
1. Check for diaphragm rupture.
2. Check tightness of piston plates to shaft.
Pump rattles.
Create false discharge head or suction lift.
SUGGESTED INSTALLATION

DISASSEMBLY/REASSEMBLY
Step 3: Remove the top manifold and lift the center
sectionotheinletmanifold.
Step 2: Utilizing the 9/16" box wrench, start by
removing the four long carriage bolts that secure
the top and bottom manifolds to the center section.
Step 1: Before starting disassembly, mark a line
from each liquid chamber to its corresponding air
chamber. This line will assist in proper alignment
during reassembly.
NTG25 NOMAD TRANS-FLO™
Tools Required:
Adjustable Wrench
15 mm (9/16") Box Wrench
19 mm (3/4") Box Wrench Vise
Equipped with soft jaws
7

Step 4: Remove the discharge valve balls, seats and
o-rings along with the valve seat, valve seat o-ring and
valve ball from the discharge manifold and inspect for
nicks, gouges, chemical attack or abrasive wear.
Step 5: Inspect the valve seat, valve seat o-ring,
and valve ball from intake manifold. Check for nicks,
gouges, chemical attack or abrasive wear.
Step 6: With the 3/4" box wrench or by
rotating the diaphragm by hand, remove the
diaphragm assembly.
Step 7: Due to varying torque values, one
of the following two situations may occur:
1) The outer piston, diaphragm and inner piston
remain attached to the shaft and the entire
assembly can be removed from the center
section. 2) The outer piston, diaphragm, inner
piston and disc spring separate from the shaft
which remains connected to the opposite side
diaphragm assembly.
NTG25 NOMAD TRANS-FLO™
8

Center Block Assembly:
The pump’s center block consists of a
polypropylene or aluminum housing with a
cast-in bronze bushing. The bushing has eight
grooves cut on the inside diameter. There are
fourTRACKER™sealsthattinthesegrooves.
Since these TRACKER™ seals form a part of
the shifting function of the pump, it is necessary
that they be located in the proper grooves. When
bushing wear becomes excessive, a new center
block must be used.
CENTER BLOCK/SEAL DISASSEMBLY
Step 8: To remove the diaphragm assembly from
the shaft, secure shaft with soft jaws. Using an
adjustable wrench, remove the diaphragm assembly
from shaft.
NTG25 NOMAD TRANS-FLO™
Grooves in bushing
which contain
TRACKER™ seals
DISASSEMBLY/REASSEMBLY
9
P/N N02-3210-77-225 P/N N02-3820-03-07

10
EXPLODED VIEW (RUBBER DIAPHRAGMS)
NTG25 NOMAD TRANS-FLO™
EXPLODED VIEW (PTFE DIAPHRAGMS)

10 Air Valve Cap Screw 1/4" = 20 x 2" 4 N02-6000-03
17 Outer Piston 2 N02-4550-03
18 Liquid Chamber 2 N02-5000-03
19 Discharge Manifold 1 N02-5020-03
20 Inlet Manifold 1 N02-5080-03
21 Manifold Bolt 3/8" - 16 x 8 1/2" 4 N02-6080-03
24 Valve Seat, S.S. 4 N02-1120-03
26 Manifold Bolt Washer 3/8" 4 N02-6720-03
27 Manifold Bolt Nut 3/8" - 16 4 N02-6430-03
NTG25 NOMAD TRANS-FLO™
NTG25 RUBBER-FITTED (316 S.S.)
NTG25 RUBBER-FITTED (ALUMINUM)
11
Item Description Qty. Part Number
1 Air Valve Assembly 1 N02-2012-07
2 Air Valve End Cap w/Guide 1 N02-2332-01
3PressureDierentialCap 1 N02-2301-01
4 Air Valve Snap Ring 2 N02-2651-08
5 Air Valve Cap O-ring 2 N02-3201-52
6 Air Valve Gasket 1 N02-2600-52
7 Center Section 1 N02-3151-20-225
8MuerPlate 1 N02-3180-20
9MuerPlateGasket 1 N02-3500-52-500
10 Air Valve Cap Screw 1/4" - 20 x 6 1/4" 4 N02-6000-08
Hex Head Nut 1/4" -20 (Not Shown) 4 N02-6400-08
11 Center Block TRACKER™ Seal 4 N02-3210-77-225
12 Shaft 1 N02-3800-03-07
14 Disc Spring 2 N02-6802-08
15 Inner Piston 2 N02-3701-01
16 Diaphragm - Neoprene 2 N02-1010-51
17 Outer Piston 2 N02-4550-01
18 Liquid Chamber 2 N02-5000-01
19 Discharge Manifold 1 N02-5020-01
20 Inlet Manifold 1 N02-5080-01
21 Manifold Bolt 3/8" -16 x 8-1/2" 4 N02-6080-08
22 Muer 1 N02-3510-99
23 Valve Ball - Neoprene 4 N02-1080-51
24 Valve Seat - Aluminum 4 N02-1120-01
25 Valve Seat O-ring - Neoprene 4 N02-1200-51
26 Manifold Bolt Washer 3/8" 4 N02-6720-08
27 Manifold Bolt Nut 3/8" - 16 4 N02-6430-08

NTG25 RUBBER-FITTED
NTG25 NOMAD TRANS-FLO™
12

NTG25 NOMAD TRANS-FLO™
NTG25 PTFE-FITTED (ALUMINUM)
NTG25 PTFE-FITTED (316 S.S.)
13
Item Description Qty. Part Number
1 Air Valve Assembly 1 N02-2012-07
2 Air Valve End Cap w/Guide 1 N02-2332-01
3PressureDierentialCap 1 N02-2301-01
4 Air Valve Snap Ring 2 N02-2651-01
5 Air Valve Cap O-ring 2 N02-3201-52
6 Air Valve Gasket 1 N02-2600-52
7 Center Section 1 N02-3151-20-225
8MuerPlate 1 N02-3180-20
9MuerPlateGasket 1 N02-3500-52-500
10 Air Valve Cap Screw 1/4" - 20 x 6 1/4" 4 N02-6000-08
Hex Head Nut 1/4" -20 (Not Shown) 4 N02-6400-08
11 Center Block TRACKER™ Seal 4 N02-3210-77-225
12 Shaft 1 N02-3820-09-07
13 Disc Spring 2 N02-6802-08
14 Inner Piston 2 N02-3750-01
15 Outer Piston 2 N02-4601-01
16 Shaft Stud 2 N02-6150-08
17 Liquid Chamber 2 N02-5000-01
18 Discharge Manifold 1 N02-5020-01
19 Inlet Manifold 1 N02-5080-01
20 Manifold Bolt 3/8" -16 x 8-1/2" 4 N02-6080-08
21 Muer 1 N02-3510-99
22 Back-up Diaphragm 2 N02-1060-51
23 Diaphragm-Teon 2 N02-1010-55
24 ValveBall-Teon 4 N02-1080-55
25 Valve Seat - Aluminum 4 N02-1120-01
26 ValveSeatO-ring-Teon 4 N02-1200-55
27 Manifold Bolt Washer 3/8" 4 N02-6720-08
28 Manifold Bolt Nut 3/8" - 16 4 N02-6430-08
10 Air Valve Cap Screw 1/4" - 20 x 2" 4 N02-6000-03
15 Outer Piston 2 N02-4600-03
17 Liquid Chamber 2 N02-5000-03
18 Discharge Manifold 1 N02-5020-03
19 Inlet Manifold 1 N02-5080-03
20 Manifold Bolt 3/8" - 16 x 8 1/2" 4 N02-6080-03
25 Valve Seat, S.S. 4 N02-1120-03
27 Manifold Bolt Washer 3/8" 4 N02-6720-03
28 Manifold Bolt Nut 3/8" - 16 4 N02-6430-03

NTG25 NOMAD TRANS-FLO™
NTG25 PTFE-FITTED
14

1351 Park Ave., Suite 104
Redlands, CA USA 92373
[phone]
A JDA Global Company