Techcon SYSTEMS TS5420 Precision Needle Valve User Guide

Techcon SYSTEMS TS5420 Precision Needle Valve

Product Information

Specifications

Model| Size| Weight| Fluid Inlet Port| Fluid Outlet Port| Air Inlet Port| Auxiliary Air Inlet Port| Minimum Air Pressure| Maximum Fluid Pressure| Operating Frequency| Mounting Port| Wetted Parts
---|---|---|---|---|---|---|---|---|---|---|---
TS5420| 4.6” Length X 1.1” (117mm X 28.5mm)| 0.3 lb (136g)| ” NPT female Luer Lock| 10-32 UNF| 10-32 UNF| 70 psi (4.8bar)| 300 psi (20.7bar)| Exceeds 400 cycles/min.| |
TS5420SS| 4.6” Length X 1.1” (117mm X 28.5mm)| 0.5 lb (227g)| ” NPT female Luer Lock| 10-32 UNF| 10-32 UNF| 70 psi (4.8bar)| 300 psi (20.7bar)| Exceeds 400 cycles/min.| |

Product Usage Instructions

Unpacking and Inspection

Carefully unpack the valve and examine the items contained in the carton. These will include:

• TS5420 or TS5420SS Needle Valve
• Other accessories or optional items (if applicable)

Description

The TS5420 Needle Valve is a normally closed, adjustable opening, needle, and seat valve. Inlet air pressure through port (1) retracts the needle assembly (2) from the seat (3) allowing fluid to flow from the valve fluid inlet (4) to the Luer lock outlet (5).
Relieving the input air pressure allows the spring (6) to return the needle to its position to close the material path.

Theory of Operation

The TS5420 Needle Valve operates as follows:

1. Inlet air pressure retracts the needle assembly from the seat.
2. Fluid flows from the valve fluid inlet to the Luer lock outlet.
3. Relieving the input air pressure allows the spring to close the material path.

Mounting Instructions

No specific mounting instructions are provided in the user manual.

Troubleshooting

Some common problems and their possible causes and corrections:

70 psi (4.8bar)
| Dispense tip clogged or damaged| Replace tip
Fluid cured in the valve chamber| | Clean valve thoroughly
The stroke adjustment closed| | Open stroke adjustment counterclockwise
Fluid pressure fluctuating| | Make sure fluid pressure is constant
The valve operating pressure is too low| | Increased valve pressure to 70 psi (4.8bar)
Valve open time is not consistent| | Check to make sure the valve controller is providing a
consistent output
Air trapped in fluid housing| | Purge valve
Fluid drools after the valve closes, eventually stopping| | Air trapped in fluid housing
| | Purge valve
Steady drip| | Dirty needle and seat
| | Worn needle and seat
| Fluid pressure exceeds 300 psi (20.7bar)| Lower fluid pressure
| Valve re-assembled incorrectly| Perform thorough cleaning
| | Replace worn or damaged part
| | Re-assemble the valve following instructions

Standard Accessories

Optional Accessories

Fluid Fittings and Tubing

Brackets

SPECIFICATIONS

28.5mm)
Weight| 0.3 lb (136g)| 0.5 lb (227g)
Fluid Inlet Port| ⅛” NPT female| ⅛” NPT female
Fluid Outlet Port| Luer Lock| Luer Lock
Air Inlet Port| 10-32 UNF| 10-32 UNF
Auxiliary Air Inlet Port| 10-32 UNF| 10-32 UNF
Minimum Air Pressure| 70 psi (4.8bar)| 70 psi (4.8bar)
Maximum Fluid Pressure| 300 psi (20.7bar)| 300 psi (20.7bar)
Operating Frequency| Exceeds 400 cycles/min.| Exceeds 400 cycles/min.
Mounting Port| ¼-20 UNC-2B| ¼-20 UNC-2B
Wetted Parts| Type 303 SS, Al., Teflon®, EPR| Type 303 SS, Teflon®, Delrin®, EPR

UNPACKING AND INSPECTION

• Carefully unpack the valve and examine the items contained in the carton.

These will include:

• • Valve Assembly
• • Valve bracket and air hose
• • Sample tip kit and fluid line
• • User guide

DESCRIPTION

• The TS5420 Needle Valve is designed to dispense low to medium-viscosity material with very precise deposits over a wide range of shot and bead sizes, down to a fraction of a microliter. An internal spring return makes the valve fully adaptable for use with
• Techcon Systems time/pressure controllers. A short opening stroke provides an extremely fast, positive shut-off. An external stroke control adjustment makes it easy for the operator to fine-tune shot sizes. The TS5420’s compact design allows for mounting flexibility and easy integration into automated applications.

THEORY OF OPERATION

• The TS5420 Needle Valve is a normally closed, adjustable opening, needle, and seat valve. Inlet air pressure through port (1) retracts the needle assembly (2) from the seat (3) allowing fluid to flow from the valve fluid inlet (4) to the Luer lock outlet (5).
• Relieving the input air pressure allows the spring (6) to return the needle to its position to close the material path.

SETUP INSTRUCTIONS

Refer to Figure 3.0

Note: This installation uses Luer lock adapters shipped with the valve. Any approved material line with ⅛” NPT connections will work.

1. If desired, mount the valve to the bracket included.
2. Connect fluid feed line to valve inlet port (1).
3. Install valve actuating air hose to air inlet port (2).
4. Connect the valve air hose to an approved valve controller, such as the TS500R.
5. Set the fluid reservoir pressure. Do not exceed 300 psi (20.7 bar).
6. Make sure all connections are tight.
7. Place a container under the valve outlet and activate the valve until the fluid flows steadily.
8. Attach the appropriate dispense tip to the Luer lock outlet fitting (3).

The amount of fluid that flows through the valve is determined by:

• Flow control adjustment: Turn the end cap counterclockwise to increase the material flow rate.
• Length of actuation, set at controller (valve open time).
• Fluid reservoir pressure
• Dispense tip size

TYPICAL SYSTEM SET-UP

MAINTENANCE AND CLEANING:

• Tool required: 5/8” open-end wrench; Snap ring pliers, o-ring removal tool (P/N TSD1597-7).
• 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.

NOTE:

• Make sure the fluid pressure is released before the valve is disassembled
• To replace seals, please order seal kit part number: 5420-SEAL KIT
• To repair a valve, please order valve kit part number: 5420-VALVEKIT

Thorough Cleaning

• Refer to Figure 5.0

1. Release fluid pressure.
2. Disconnect the fluid line and remove the fluid inlet fitting.
3. Disconnect valve air hose.
4. Turn the stroke control knob (15) two turns counterclockwise from the closed position.
5. Hold the fluid housing (8) and rotate the air cylinder (2) counterclockwise. When completely un-threaded, pull the two valve segments straight apart to separate.
6. Inspect the o-ring (6), and replace the o-ring if damage is found.
7. Remove the cup seal (7), and replace the seal if damaged is found.
8. Remove the Luer adapter assembly (9).
9. Clean the fluid housing (8), needle/piston assembly (5), and Luer adapter assembly (9).
   • NOTE: Avoid using sharp probes for cleaning. Any nicks or scratches on the seal or the surfaces of the needle/piston assembly may cause leakage.
10. Insert cup seal (7) into fluid housing (8) using the 5420-SIT insertion tool. Make sure the o-ring side is facing down.
11. Reinstall the Luer adapter assembly (9) to fluid housing (8).
12. Lubricate o-ring (6) with Bimba HT-99, or equivalent
13. Thread the air cylinder/needle assembly into the fluid housing.
14. Make sure not to cross-thread.

Nozzle Seat Replacement (refer to figure 6.0)

1. Insert the thumb screw inside the nozzle (16) and rotate clockwise to attach to the seat (17).
2. Secure the nozzle in a “soft jaw” vise and then pull the thumb screw, with the seat attached, straight out.
3. Install the new seat on the thumb screw and then insert the thumb crew straight into the nozzle. To ensure proper seat alignment, it is recommended that the seat installation is done on an Arbor Press.

To Replace Seal in Air Cylinder

1. Hold the fluid housing (8) and rotate the air cylinder (2) counterclockwise. When completely un-threaded, pull the two valve segments straight apart to separate.
2. Remove the stroke control knob (15) by rotating it in a counterclockwise direction.
3. Remove compression spring (1).
4. Using the snap ring pliers, remove the retaining ring (3).
5. Remove Mylar washers (14).
6. Pull the needle/piston assembly (5) straight out from the air cylinder (2).
7. Using the snap ring pliers, remove the retaining ring (11).
8. Remove the nylon washer (12) from the air cylinder.
9. Using the o-ring removal tool, remove the o-ring (13).
10. Replace all o-rings if necessary.
11. Lubricate all o-rings with Bimba HT-99, or equivalent.
12. Reinstall o-ring (13).
13. Reinstall the nylon washer (12) and secure it with a retaining ring (11).
14. Thread the air cylinder (2) into fluid housing (8). Make sure not to cross-thread.
15. Reinstall needle/piston assembly (5) and secure with retaining ring (3).
16. Reinstall the first Mylar washer (14) on the needle/piston assembly (5).
17. Reinstall compression spring (1) into air cylinder (2).
18. Reinstall the second Mylar washer (14) in the stroke control knob (15).
19. Reinstall the stroke control knob (15).

SPARE PARTS

Valve Rear Section

Recommended lubricant: All o-rings & seals must be lubricated with Bimba HT-99 or equivalent.

Valve Front Section

Recommended lubricant: All O-Rings & seals must be lubricated with Bimba HT-99, or equivalent, except for TSD400-70, which must remain dry.

REPAIR KITS

These kits are for both variations of Techcon Systems Needle Valve

STANDARD ACCESSORIES

OPTIONAL ACCESSORIES

FLUID FITTINGS AND TUBING

BRACKETS

TROUBLESHOOTING

is constant
The valve operating pressure is too low| Increased valve pressure to 70 psi (4.8bar)
Valve open time is not consistent| Check to make sure the valve controller is providing a consistent output
Air trapped in fluid housing| Purge valve
Fluid drools after the valve closes, eventually stopping| Air trapped in fluid housing| Purge valve
Steady drip| Dirty needle and seat| Perform thorough cleaning
Worn needle and seat| Replace worn or damaged part
Fluid pressure exceeds 300 psi (20.7bar)| Lower fluid pressure
Valve re-assembled incorrectly| Re-assemble the valve following instructions

LIMITED WARRANTY

• The manufacturer warrants this product to the original purchaser for one (1) year from the date of purchase to be free from defects in material and workmanship, but not against damages by misuse, negligence, accident, faulty installations and instructions. The manufacturer will repair or replace (at the 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 Manufacturer 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 Manufacturer’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 authorization is required from Techcon Systems prior to shipping a defective unit to the factory.
• Manufacturer reserves the right to make engineering product modifications without notice.
• All returns must be issued with a Returns Authorization number, before return. Send warranty returns to:
• Americas and Asia ——————————————-
• OK International ——————————————-
• Garden Grove Division ——————————————-
• 12151 Monarch Street ——————————————-
• Garden Grove, Ca 92841 ——————————————-
• Europe ——————————————-
• OK International ——————————————-
• Eagle Close ——————————————-
• Chandler’s Ford Ind Est ——————————————-
• Eastleigh ——————————————-
• Hampshire ——————————————-
• SO53 4NF ——————————————-
• United Kingdom ——————————————-
• Delrin® and Teflon® is a registered trademark of E.I. DuPont.

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