AD5622VT Diaphragm Valve User Guide

Adhesive Dispensing Ltd AD5622VT Series Diaphragm Valve

User Guide

CONTENTS

Page number 1. Specifications .........................................................................................................................3 2. Unpacking and Inspection ......................................................................................................5 3. Description .............................................................................................................................5 4. Theory of Operation ...............................................................................................................5 5. Setup Instructions ...................................................................................................................6 6. Typical System Setup.............................................................................................................7 7. Troubleshooting......................................................................................................................8 8. Maintenance and Cleaning 8.1 Cleaning ............................................................................................................................9 8.2 To Change the Diaphragm ...............................................................................................10 8.3 To Change and Lubricate Piston O-ring...........................................................................11 9. Spare Parts and Accessories 9.1 Spare Parts ........................................................................................................................ 12 9.2 Standard Accessories........................................................................................................13 9.3 Optional Accessories ........................................................................................................ 14 10. Warranty ................................................................................................................................. 15

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1. SPECIFICATIONS

VERTICAL MOUNT CONFIGURATIONS

Size

78.4mm length x 27.88mm diameter body (29.40mm diameter Fluid Housing)

0.26lb (118g)

Weight

Fluid Inlet Port

1/8” NPT female

Fluid Outlet Port

M5 female

Air Inlet Port

10-32 UNF

Mounting Port

10-32 UNF

Air Pressure required Maximum Fluid Pressure

70 – 90 psi (4.8 – 6.2 bars)

70 psi (4.8 bars)

Operating Frequency

Exceeds 500 cycles/min.

Wetted Parts

Teflon 

Dimensions are in mm Figure 2.0

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2. UNPACKING AND INSPECTION Carefully unpack the valve and examine the items contained in the carton. These will include: • Valve Assembly • Tip Adapter and Fluid Inlet Fitting • User Guide • Valve Air Hose

Inspect the unit for any damage which may have occurred in transit. If such damage has occurred, notify the carrier at once. Claim for damage must be made by the consignee to the carrier and should be reported to the supplier. 3. DESCRIPTION The AD5622V Series Diaphragm valves are designed to dispense low to medium viscosity fluids. An internal spring return makes the valve fully adaptable for use with any time/pressure controller units. A short opening stroke provides extremely fast, positive shut-off. An external stroke control adjustment makes it easy to fine tune shot sizes. The AD5622V Series compact design allows for mounting flexibility and easy integration into automated applications. 4. THEORY OF OPERATION The AD5622V Series Diaphragm Valves are normally closed, adjustable stroke valves. Input air pressure of 70-90 psi (4.8 to 6.2 bars) through port (1) drives the piston assembly (2) back, opening the material path, allow fluid flow from the material inlet (3) to the material outlet (4). Relieving the input air pressure allows the piston return spring to close the diaphragm, ensuring rapid “fail-safe” shut-off of fluid flow.

1

2

3

4

Figure 3.0

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5. SETUP INSTRUCTIONS Refer to figure 4.0

1. Connect the fluid reservoir feed tube (1) to the valve inlet port (2). 2. Connect the valve airline (3) to the valve controller or other pneumatic device that is used to control the valve. 3. Connect appropriate dispensing tip or nozzle to the fluid outlet port (4). 4. Set the valve controller pressure at 70 psi (4.8 bars) 5. Set the fluid reservoir pressure. Do not exceed 70 psi (4.8 bars) 6. Make sure all connections are tight 7. Place container under the valve outlet and activate the valve until the fluid flows steady. The amount of fluid that flows through the valve is determined by: • Valve open time • Fluid reservoir pressure • Dispensing tip size

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1

2

4

Figure 4.0

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6. TYPICAL SYSTEM SETUP

PLANT AIR MUST BE PROPERLY FILTERED AND DRY. IF NOT, SPECIFY A 5-MICRON FILTER REGULATOR.

CONTROLLER OR EQUIVALENT

FLUID FEED SYSTEM

Figure 5.0

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7. TROUBLESHOOTING PROBLEM

POSSIBLE CAUSE

CORRECTION

Fluid pressure too low

Increase fluid pressure

Operating pressure too low

Increase air pressure to 70 psi (4.8 bars)

No fluid flow

Dispense tip clogged

Replaced tip

Fluid cured in valve chamber

Clean valve thoroughly

The stroke adjustment closed

Open stroke adjustment counterclockwise

Fluid pressure fluctuating

Make sure fluid pressure is constant

Valve operating pressure is too low

Increased valve pressure to 70 psi (4.8 bars) Check to make sure the valve controller is providing a consistent output

Inconsistent fluid flow

Valve open time is not consistent

Air trapped in fluid housing

Purge valve

Fluid drools after the valve closes, eventually stopping

Air trapped in fluid housing

Purge valve

Worn diaphragm

Replace diaphragm

Worn fluid housing

Replace fluid housing

Steady drip

Fluid pressure exceeds 70 psi (4.8 bars) Valve re-assembled incorrectly after cleaning

Lower fluid pressure

Refer to Maintenance section

Fluid leaks between diaphragm and fluid housing

Mounting screws loose

Tighten screws

Fluid leaks out of bleed hole Diaphragm ruptured

Replace diaphragm

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8. MAINTENANCE AND CLEANING Normally, purging the valve with appropriate flush material or solvent after use is sufficient for cleaning. However, some material may cause a buildup in the valve chamber, in this case periodic and thorough cleaning will be required.

CAUTION: Make sure the fluid pressure is released before dis-assemble the valve.

8.1 Cleaning

Refer to figure 6.0 1. Release fluid pressure 2. Disconnect fluid line 3. Disconnect valve air line 4. Remove the two socket head cap screws (1) from the fluid housing (2) 5. Pull the fluid housing away from the air cylinder assembly (10) 6. Clean Diaphragm (3) and fluid housing (2)

NOTE: Avoid using sharp probes for cleaning. Any nicks or scratches on the diaphragm or the sealing area of the fluid housing may cause leakage.

7. Reinstall the fluid housing (2). 8. Align the fluid housing mounting holes with diaphragm and air cylinder holes. 9. Reinsert the two socket head cap screws (1). Tighten in accordance with the Torque specifications Chart below.

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8.2 To Change the Diaphragm Tool required: Flat tip screwdriver, Snap ring flier, 7/64” hex wrench. 1. Remove the two socket head cap screws (1) from the fluid housing (2) 2. Pull the fluid housing away from the air cylinder assembly (10) 3. Remove the old diaphragm (3) by unscrew it in the counterclockwise direction. 4. Install the new diaphragm by threading it in the clockwise direction. Make sure the internal thread on the diaphragm is not stripped or cross-threaded. 5. Hand tightened the diaphragm until it bottoms against shoulder on piston rod. At this point, do not over tighten or loosen the diaphragm to align the diaphragm and air cylinder holes. 6. The valve is designed so that the fluid housing can be rotated in 45 ° increments to allow for material input/output alignment. To align the holes of the diaphragm with the appropriate holes in the air cylinder body, insert a small flat tip screwdriver through the hole in the stroke control knob (8) and engage the piston rod slot. Turn the screwdriver clockwise to rotate the rod, piston and diaphragm assembly until the appropriate holes are lined up. 7. Reinstall the fluid housing (2). 8. Align the fluid housing mounting holes with diaphragm and air cylinder holes. 9. Reinsert the two socket head cap screws (1). Tighten in accordance with the Torque specifications Chart below.

Fluid Housing Material UHMW and Teflon 

Torque specifications 7 in lb (0.79 N-m)

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8.3 To Change or Lubricate Piston O-ring 1. Remove the fluid housing (2). 2. Remove the diaphragm (3).

3. Remove the stroke control knob (8) and spring (9). 4. Remove the retainer ring (5) and anti-rotating washer (6). 5. Remove the piston assembly (11). 6. Replace O-ring (4) if damaged; otherwise lubricate O-ring with O-ring grease. 7. Reinstall piston, retainer ring and anti-rotating washer.

8. Reinstall spring and stroke control knob. 9. Reinstall diaphragm and fluid housing.

Figure 6.0

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9. SPARE PARTS AND ACCESSORIES 9.1 Spare Parts:

The fluid housing replacement kit includes:

AD5622VU-FHKIT REPAIR KIT, DIAPHRAGM VALVE

SOCKET HEAD CAP SCREW (1)

FLAT WASHER

FLUID HOUSING (2)

FLUID OUTLET FITTING (2)

FLUID INLET FITTING (13)

The diaphragm replacement kit includes:

AD620UHMW-DKIT REPAIR KIT, DIAPHRAGM VALVE

O-RING (4) (5/8"IDX1/16"CS) O-RING (3) (7/16"IDX3/32"CS)

DIAPHRAGM ASSEMBLY (3)

Figure 7.0

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Please refer to the chart below for part numbers: VAVLE PART NUMBER

FLUID HOUSING KIT AD5622VT-FHKIT

DIAPHRAGM KIT AD5620TFE-DKIT

AD5622VT

9.2 Standard Accessories:

PART NUMBER 5620-000-008 918-000-048 9000-000-100 TSD126-360BK

DESCRIPTION Mounting Rod

Bracket

Sample needles kit

Black fluid line Hex Wrench

TSD1597-13

9.3 Optional Accessories:

The flowing components are needed to make a bench mounting stand:

PART NUMBER

DESCRIPTION

918-033-000 918-000-012

Production master stand

Rod Clamp

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AD SERIES NEEDLE

PART NUMBER

Gauge

Hub Color

ID(in)

AD714050PK AD715050PK AD718050PK AD720050PK AD721050PK AD722050PK AD723050PK AD725050PK AD727050PK AD730050PK AD732025PK

Olive

14 15 18 20 21 22 23 25 27 30 32

.063 .054 .033 .024 .020 .016 .013 .010 .008 .006 .004

Amber Green

Pink

Purple

Blue

Orange

Red

Clear

Lavender

Yellow

TT SERIES NEEDLE

PART NUMBER

Gauge

Hub Color

ID (in)

AD14TTN-B AD16TTN-B AD18TTN-B AD20TTN-B AD22TTN-B

14 16 18 20 22

Olive Grey Green

.063 .047 .033 .024 .016

Pink Blue

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10. LIMITED WARRANTY Supplier warrants this product to the original purchaser for a period of one (1) year from date of purchase to be free from defects in material and workmanship, but not against damages by misuse, negligence, accident, faulty installations and instructions. Supplier will repair or replace (at factory’s option), free of charge, any component of the equipment thus found to be defective, on return of the component, “PREPAID” to the factory during the warranty period. In no event shall any liability or obligation of the Supplier arising from this warranty exceed the purchase price of the equipment. This warranty is only valid if the defective product is returned as a complete assembly without physical damage. The Supplier’s liability, as stated herein, cannot be altered or enlarged except by a written statement signed by an officer of the company. In no event shall the Manufacturer be liable for consequential or incidental damages. A return authorisation (RMA) is required from Adhesive Dispensing Ltd prior to shipping a defective unit to the factory. Supplier reserves the right to make engineering product modifications without notice.

Send warranty returns to: Adhesive Dispensing Ltd

14 Clarke Road Milton Keynes MK1 1LG, UK

Teflon is a registered trademark of E.I. DuPont.

AD9000073-F

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