VERDER AIR VA 25 Operation manual

INSTRUCTIONS–PARTS LIST
Air-Operated
Diaphragm Pumps
819.0254
Rev. L
EN
Intended for use in accordance with the United States Flammable and Combustible Liquids
Code (NFPA 30) and the Automotive and Marine Service Station Code (NFPA 30A).
For professional use only.
VERDER VA 25
Evacuation and Transfer Pumps
120 psi; 0.84 MPa; 8.4 bar Maximum Fluid Working Pressure
120 psi; 0.84 MPa; 8.4 bar Maximum Air Input Pressure
Part No. 810.0780*
with TPE diaphragms and seats, acetal balls
Part No. 810.0930*
with TF diaphragms and balls, fluoroelastomer seats
Patent No.
CN ZL94102643.4
FR 9408894
JA 3517270
US 5,368,452 Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
This symbol on the nameplate means the
product is listed by Underwriters
Laboratories Inc. (UL Standard No. 79,
Standard for Power-Operated Pumps for
Petroleum Product Dispensing Systems).
II 2 GD
Ex h IIC 66°C...135°C Gb
Ex h IIIC T135°C Db
*
Model 810.0780
ATEX T-code rating is dependent on the temperature of the fluid
being pumped. Fluid temperature is limited by the materials of the
pump interior wetted parts. See Technical Data for the maximum
fluid operating temperature for your specific pump model.

2 819.0254
Table of Contents
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Tightening Screws Before First Use . . . . . . . . . . . . . . .5
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Mountings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Air Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Waste Oil Receiver Evacuation System, or
General Fluid Transfer Application . . . . . . . . . . . .7
Gear Oil Evacuation System . . . . . . . . . . . . . . . . .7
Fuel Dispense System . . . . . . . . . . . . . . . . . . . . . .8
Pressure Relief Valve (Fuel Dispense Systems) . . . . .8
Changing the Orientation of the Fluid Inlet
and Outlet Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Air Exhaust Ventilation . . . . . . . . . . . . . . . . . . . . . . . . .9
Fluid Pressure Relief Kit
(for Pump Model 810.0780 only) . . . . . . . . . . . . . . .10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . . .11
Flush the Pump Before First Use . . . . . . . . . . . . . . . .11
Starting and Adjusting the Pump . . . . . . . . . . . . . . . .12
Pump Shutdown (All Systems) . . . . . . . . . . . . . . . . . .12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Flushing and Storage . . . . . . . . . . . . . . . . . . . . . . . . . 13
Tightening Threaded Connections . . . . . . . . . . . . . . . 13
Preventive Maintenance Schedule . . . . . . . . . . . . . . . 13
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Repairing the Air Valve . . . . . . . . . . . . . . . . . . . . . . . .15
Ball Check Valve Repair . . . . . . . . . . . . . . . . . . . . . . .17
Diaphragm Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Bearing and Air Gasket Removal . . . . . . . . . . . . . . . . 21
Parts Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Evacuation and transfer pumps . . . . . . . . . . . . . . . . .23
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fluid Section Repair Kit 819.0986 . . . . . . . . . . . . . . . 24
Air Valve Repair Kit 819.4274 . . . . . . . . . . . . . . . . . . .24
Torque Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Evacuation and Transfer Pumps (Model 810.0780) . . 26
Customer Services/Guarantee . . . . . . . . . . . . . . . . . . . . 27

819.0254 3
Symbols
Warning Symbol
Thissymbol alerts youto the possibilityof serious injuryor
death if you do not follow the instructions.
Caution Symbol
This symbol alerts you to the possibility of damage to or
destruction of equipment if you do not follow the
instructions.
Warning Caution
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
• This equipment is for professional use only.
• Read all instruction manuals, tags, and labels before operating the equipment.
• Use the equipment only for its intended purpose. If you are not sure, call your VERDER
distributor.
• Do not alter or modify this equipment.
• Check equipment daily. Repair or replace worn or damaged parts immediately.
• Do not exceed the maximum working pressure of the lowest rated component in your system.
Refer to the Technical Data on page 26 for the maximum working pressure of your equipment.
• Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the
Technical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s
warnings.
• Do not kink or overbend hoses or use hoses to pull equipment.
• Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not
expose VERDER hoses to temperatures above 82°C (180°F) or below -40°C (-40°F).
• Wear hearing protection when operating this equipment.
• Do not lift pressurized equipment.
• Comply with all applicable local, state, and national fire, electrical, and safety regulations.
• Never use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in pressurized aluminum equipment. Such use could result in a
chemical reaction, with the possibility of explosion.

4 819.0254
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
• Know the specific hazards of the fluid you are using.
• Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
• Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid
and solvent manufacturer.
• Pipe and dispose of the exhaust air safely, away from people, animals, and food handling areas.
If the diaphragm fails, the fluid is exhausted along with the air. See Air Exhaust Ventilation on
page 9.
•Never use an acetal pump to pump acids. Take precautions to avoid acid or acid fumes from
contacting the pump housing exterior. Stainless steel parts will be damaged by exposure to acid
spills and fumes.
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames, or sparks can cause a hazardous condition and
result in a fire or explosion and serious injury.
• Ground the equipment. Refer to Grounding on page 5.
• If there is any static sparking or you feel an electric shock while using this equipment, stop
pumping immediately. Do not use the equipment until you identify and correct the problem.
• Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being pumped.
• Pipe and dispose of the exhaust air safely, away from all sources of ignition. If the diaphragm
fails, the fluid is exhausted along with the air. See Air Exhaust Ventilation on page 9.
• Keep the work area free of debris, including solvent, rags, and gasoline.
• Electrically disconnect all equipment in the work area.
• Extinguish all open flames or pilot lights in the work area.
• Do not smoke in the work area.
• Do not turn on or off any light switch in the work area while operating or if fumes are present.
• Do not operate a gasoline engine in the work area.
• Keep a fire extinguisher in the work area.
WARNING

819.0254 5
Installation
General Information
• The Typical Installations shown in Fig. 2 to Fig. 4 are
only guides for selecting and installing system
components. Contact your VERDER distributor for
assistance in planning a system to suit your needs.
• Reference numbers and letters in parentheses refer
to the callouts in the figures and the parts lists on
pages 23 to 24.
• Installation and use must be in accordance with the
Flammable and Combustible Liquids Code (NFPA
30) and Automotive and Marine Service Station Code
(NFPA 30A) and must comply with all local, state,
and federal codes.
• All pipe joints are to be made tight with UL listed
gasoline-resistant pipe compound.
Tightening Screws Before First Use
Before using the pump for the first time, check and
retorqueallexternalfasteners.SeeTorque Sequence on
page 25. After the first day of operation, retorque the
fasteners. Although pump use varies, a general guideline
is to retorque fasteners every two months.
Grounding
•Pump: loosen the grounding screw (W). Insert one
end of a 12 ga (1.5 mm2) minimum ground wire (Y)
behind the grounding screw and tighten the screw
securely. See Fig. 1. Connect the clamp end of the
ground wire to a true earth ground. Order Part No.
819.0157 Ground Wire and Clamp.
•Air and fluid hoses: use only grounded hoses with a
maximum of 500 ft (150 m) combined hose length to
ensure grounding continuity.
•Air compressor: follow manufacturer’s
recommendations.
•Solvent pails: Ground all solvent pails used when
flushing, according to local code. Use only metal
pails, which are conductive. Do not place the pail on
a non-conductive surface, such as paper or
cardboard, which interrupts the grounding continuity.
•Fluid supply container: ground according to local
code.
•Suction device nozzle: must be bonded to metal
container from which it is suctioning by firm
metalto-metal contact to a properly grounded suction
hose and pump.
•Piping, valves, and fittings: use only electrically
conductive materials. Bond and ground per code.
Check your system electrical continuity after the initial
installation, and then set up a regular schedule for
checking continuity to be sure proper grounding is
maintained.
Fig. 1
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read the
section FIRE AND EXPLOSION HAZARD
on page 4.

6 819.0254
Installation
Mountings
• Be sure the mounting surface can support the weight
of the pump, hoses, and accessories, as well as the
stress caused during operation.
• For all mountings, be sure the pump is bolted directly
to the mounting surface.
• For ease of operation and service, mount the pump
so the air valve cover (2), air inlet, and fluid inlet and
outlet ports are easily accessible.
• Rubber Foot Mounting Kit 819.4333 is available to
reduce noise and vibration during operation.
Air Line
1. Install the air line accessories as shown in Fig. 2 to
Fig. 4 on pages 7 and 8. Mount these accessories on
the wall or on a bracket. Be sure the air line supplying
the accessories is grounded.
a. Install an air regulator (C) and gauge to control
thefluidpressure.Thefluidoutletpressureatstall
will be the same as the setting of the air regulator.
b. Locate one bleed-type master air valve (B) close
to the pump and use it to relieve trapped air. See
theWARNINGabove.Locatetheothermasterair
valve (E) upstream from all air line accessories
and use it to isolate them during cleaning and
repair.
c. The air line filter (F) removes harmful dirt and
moisture from the compressed air supply.
2. Install a grounded, flexible air hose (A) between the
accessories and the 1/2 npt(f) pump air inlet (N). See
Fig. 6. Use a minimum 1/2 in. (13 mm) ID air hose.
Screw an air line quick disconnect coupler (D) onto
the end of the air hose (A), and screw the mating
fitting into the pump air inlet snugly. Do not connect
the coupler (D) to the fitting until you are ready to
operate the pump.
CAUTION
The pump exhaust air may contain contaminants.
Ventilate to a remote area if the contaminants could
affectyour fluid supply.See Air Exhaust Ventilation on
page 9.
WARNING
Toreducetheriskofseriousinjury,splashingintheeyes
or on the skin, and toxic fluid spills, never move or lift a
pump under pressure. If dropped, the fluid section may
rupture. Always follow the Pressure Relief Procedure
on page 11 before moving or lifting the pump.
WARNING
A bleed-type master air valve (B) is required in your
system to relieve air trapped between this valve and the
pump. Trapped air can cause the pump to cycle
unexpectedly, which could result in serious injury,
includingsplashing in theeyesor on theskin, injury from
moving parts, or contamination from hazardous fluids.

819.0254 7
Installation
Fig. 2
Fig. 3
KEY FOR FIG. 2
A Air supply line
B Bleed-type master air valve (required
for pump)
C Air regulator
D Air line quick disconnect
E Master air valve (for accessories)
F Air line filter
G Fluid suction line
H Fluid line quick disconnect
J Fluid drain valve (required)
K Fluid shutoff valve
L Fluid line
M Waste oil receiver
Y Ground wire (required; see page 5 for
installation instructions)
Waste Oil Receiver Evacuation System, or
General Fluid Transfer Application
Gear Oil Evacuation System
KEY FOR FIG. 3
A Air supply line
B Bleed-type master air valve (required
for pump)
C Air regulator
D Air line quick disconnect
E Master air valve (for accessories)
F Air line filter
G Fluid suction line
H Fluid line quick disconnect
J Fluid drain valve (required)
K Fluid shutoff valve
L Waste oil line (to storage tank)
P Suction hose
R Control valve
S Suction wand
Y Ground wire (required; see page 5 for
installation instructions)

8 819.0254
Installation
Fig. 4
Pressure Relief Valve (Fuel Dispense
Systems) Changing the Orientation of the Fluid Inlet and Outlet Ports
If desired, you can easily change the orientation of the
fluid inlet and outlet ports. See Fig. 6.
1. Remove the screws (6) holding the inlet and/or outlet
manifold (1, 3) to the covers (2).
2. Reverse the manifold and reattach. Install the screws
and torque to 120 to 150 in–lb (14–17 N•m). See
Torque Sequence on page 25.
KEY FOR FIG. 4
A Air supply line
B Bleed-type master air valve (required
for pump)
C Air regulator
D Air line quick disconnect
E Master air valve (for accessories)
F Air line filter
G Fluid suction line
J Fluid drain valve (required)
K Fluid shutoff valve
L Fluid line
T Hose reel
V Fuel dispense valve
Y Ground wire (required; see page 5 for
installation instructions)
46 Pressure relief valve (required to limit
fluid outlet pressure to 50 psi [350
kPa, 3.5 bar])
Fluid from the relief valve (46) must
be vented to a safe area.
1
Fuel Dispense System
WARNING
Fuel Dispense Model 810.0781 requires a pressure
relief valve 819.0252 (46), which is supplied with the
pump, to prevent fluid pressure from exceeding 50 psi
(350 kPa, 3.5 bar). Do not exceed the maximum air inlet
pressureof 50psi (350 kPa, 3.5 bar).Recommended air
operating pressure is 40 psi (280 kPa, 2.8 bar) or less.
Astheairinletpressureapproaches50psi(350kPa,3.5
bar),the reliefvalve willopen andvent fluid.Vented fluid
must be routed to a container in a safe place.

819.0254 9
Installation
Air Exhaust Ventilation
The air exhaust port is 3/4 npt(f). Do not restrict the air
exhaust port. Excessive exhaust restriction can cause
erratic pump operation.
To provide a remote exhaust:
1. Remove the muffler (U) from the pump air exhaust
port.
2. Install a grounded air exhaust hose (W) and connect
the muffler (U) to the other end of the hose. The
minimum size for the air exhaust hose is 3/4 in. (19
mm) ID. If a hose longer than 15 ft (4.57 m) is
required, use a larger diameter hose. Avoid sharp
bends or kinks in the hose.
3. Place a container (X) at the end of the air exhaust line
to catch fluid in case a diaphragm ruptures. See Fig.
5. Locate the container away from all sources of
ignition, including pilot lights and waste materials. If
the diaphragm ruptures, the fluid being pumped will
exhaust with the air.
VENTING EXHAUST AIR
Fig. 5
WARNING
Be sure to read and follow the TOXIC FLUID HAZARD
and FIRE AND EXPLOSION HAZARD warnings on
page 4 before operating this pump.
Be sure the system is properly ventilated for your type of
installation. You must vent the exhaust to a safe place,
away from people, animals, food handling area, and all
sources of ignition when pumping flammable or
hazardous fluids.
Diaphragm failure will cause the fluid being pumped to
exhaust with the air. Place an appropriate container at
the end of the air exhaust line to catch the fluid. See Fig.
5.
KEY
A Air supply line
B Bleed-type master air valve
(required for pump)
C Air regulator
D Air line quick disconnect
E Master air valve (for accessories)
F Air line filter
U Muffler
W Grounded air exhaust hose
X Container for remote air exhaust

10 819.0254
Installation
Fluid Pressure Relief Kit (for Pump Model 810.0780 only)
Fig. 6
Caution
Pressure Relief Kit 819.6479 (Z) is available, to
preventoverpressurization and rupture of the pump or
hose. See Fig. 6. The kit includes instructions.
Thermal expansion of fluid in the outlet line can cause
overpressurization. This can occur when using long
fluid lines exposed to sunlight or ambient heat, or
when pumping from a cool to a warm area (for
example, from an underground tank).
This kit is not for use in fuel dispense
applications. Order a fuel dispense pump, Model
810.0781, which is equipped with a pressure relief
valve 819.0252. See page 8.
Overpressurization can also occur if the VA 25 pump
is being used to feed fluid to a piston pump, and the
intake valve of the piston pump does not close,
causing fluid to back up in the outlet line.
8
N
U
5
Z
Z
6
4
2653c
2
KEY
1 1 in. npt(f) optional fluid outlet port
2 Fluid covers
3 1 in. npt(f) optional fluid inlet port
6 Manifold and cover screws
8 Air valve screws
N 1/2 in. npt(f) air inlet port
U Muffler; air exhaust port is 3/4 in. npt(f)
Z Pressure relief kit
Apply medium-strength (blue) Loctite or
equivalent to the threads and install kit between
fluid inlet and outlet manifolds.
1
Connect fluid inlet line here.
2
Connect fluid outlet line here.
3
Torque to 120 to 150 in-Ib (14 to 15 N•m).
See Torque Sequence on page 25. Apply
medium-strength (blue) Loctite or
equivalent to the threads.
4
Torque to 50 to 60 in-Ib (5.6 to 6.87 N•m).
5