Techcon TS941 High Pressure Spool Valve User Guide

Techcon TS941 High Pressure Spool Valve

Product Information

Specifications

• Model: TS934/TS941
• Size: 4.7” length X 1.5” diameter (119.4mm X 38.1mm)
• Weight: N/A
• Fluid Inlet Port: N/A
• Fluid Outlet Port: N/A
• Air Inlet Port: N/A
• Auxiliary Air Inlet Port: N/A
• Minimum Air Pressure: 70 psi (4.8bar)
• Maximum Fluid Pressure: 2,500 psi (172.4bar)
• Operating Frequency: Exceeds 400 cycles/min.
• Wetted Parts: See user manual for details

Description
The TS934/TS941 Series Spool Valve is based on a balanced spool design for a fast ON/OFF dispensing action. The hardened spool slides in reinforced UHMWPE seals and is suitable for use with fluids having a viscosity of 100 to over 3,000,000 cps, at a pressure up to 2,500 psi (172.4bar). An internal spring return makes the valve fully adaptable for use with Techcon Systems time/pressure controllers.

Product Usage Instructions

Installation

1. Ensure the valve is compatible with your application requirements.
2. Connect the necessary air and fluid lines to the corresponding ports.
3. Secure the valve in place using appropriate brackets or mounts.

Operation

1. Apply the minimum required air pressure to the valve.
2. Adjust the fluid pressure as needed based on the viscosity of the material being dispensed.
3. Control the valve using a compatible controller for precise dispensing.

Maintenance

1. Regularly clean the valve to prevent clogs and ensure smooth operation.
2. Inspect seals and spool for wear and tear, replacing them when necessary.

FAQ

• Q: What should I do if there is no fluid flow?
  A: Check if the operating pressure is too low or if the dispense tip is clogged or damaged. Increase air pressure to 70 psi (4.8bar) and replace the tip if needed.

• Q: How do I address inconsistent fluid flow?
  A: Ensure that the fluid pressure is constant and that the valve operating pressure is sufficient. Also, check for air trapped in the fluid housing and purge the valve if necessary.

• Q: What could be causing steady dripping from the valve?
  A: This could be due to a damaged lower seal or a damaged spool. Replace the lower seal or spool accordingly.

SPECIFICATIONS

diameter (119.4mm X 38.1mm)
Weight| TS934 = 1.15lb (522g) TS941 = 1.6lb (728g)| TS934A = 1.16lb (526g) TS941A = 1.61lb (731g)
Fluid Inlet Port| ⅜” NPT female| ¼” NPT female
Fluid Outlet Port| ¼” NPT female| ¼” NPT female
Air Inlet Port| ¼” NPT female| ¼” NPT female
Auxiliary Air Inlet Port| ⅛” NPT| ⅛” NPT
Minimum Air Pressure| 70 psi (4.8bar)| 70 psi (4.8bar)
Maximum Fluid Pressure| 2,500 psi (172.4bar)| 2,500 psi (172.4bar)
Operating Frequency| Exceeds 400 cycles/min.| Exceeds 400 cycles/min.
Wetted Parts| TS941 Fluid housing = Type 303 SS TS934 Fluid Housing =Aluminum

Hard Chrome plated Stainless Steel, UHWPE Seal with EPR O-Ring

| TS941A Fluid housing = Type 303 SS TS934A Fluid Housing = Aluminum

Hard Chrome plated Stainless Steel, UHMWPE Seal with EPR O-Ring

UNPACKING AND INSPECTION

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

• Valve assembly
• User guide
• Fitting and Valve Air Hose

Inspect the unit for any damaged which may have occurred in transit. If such damage has occurred, notify the carrier at once. Damage claim must be made by the consignee to the carrier, and should be reported to the manufacturer.

DESCRIPTION

The TS934/TS941 Series Spool Valve is based on a balanced spool design for a fast “ON/OFF” dispensing action. The hardened spool slides in reinforced UHMWPE seals and it suitable for use with fluids having a viscosity of 100 to over 3,000,000 cps, at a pressure up to 2,500 psi (172.4bar). An internal spring return makes the valve fully adaptable for use with Techcon Systems time/pressure controllers.

THEORY OF OPERATION
The TS934/TS941 Series Spool Valve is normally closed. When air pressure is applied at air inlet port (1), the spool assembly (2) moves forward to the open position, allowing the fluid to flow from the fluid inlet port (3) to the fluid outlet port (4). Relieving the input air pressure allows the return spring (5) to pull the spool assembly back in the close position, stopping the fluid flow. During the closing position, the spool movement creates a “suck- back” anti-drip feature.

An Oil chamber (6) is provided, above the upper seal, to create an additional liquid seal that will prevent moisture from being carried on the spool. The auxiliary air inlet port (7) is provided so that the valve may be connected for air closing with or without the spring.

SETUP INSTRUCTIONS

1. Connect the fluid reservoir feed tube (1) to the valve inlet port (2).
2. Connect the valve air line (3) to the valve controller or other pneumatic device that is used to control the valve.
3. Connect appropriate nozzle or dispensing tip (4) to the fluid outlet port.
4. Set the valve controller pressure at 70 psi (4.8bar).
5. Set the fluid reservoir pressure. Do not exceed 2,500 psi (172.4bar). (Strengthened hoses are required with pressures exceeding 100 psi (6.9bar).
6. Make sure all connections are correctly tightened.
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
  NOTE: An adjustable “suck-back” cap part number 934-003-000 is available.

TYPICAL SYSTEM SETUP

MAINTENANCE AND CLEANING

Normally, purging the valve with an appropriate flushing 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 fluid pressure is released before valve disassembly.

1. Release fluid pressure and disconnect fluid line.
2. Disconnect valve air line.
3. Remove end cap (1).
4. Pull out piston/spool assembly (4).
5. Remove the spring from air cylinder (2).
6. Remove socket head cap screws (10).
7. Separate material outlet block (9), material inlet block (6) and air cylinder (3). Clean these parts if necessary.
8. Replace o-rings (13) on the spool shaft, material outlet block (8) and air cylinder (12) if worn or damaged.
9. Remove lower seal (7) out of the outlet block and upper seal (5) out of the air cylinder using a small screw driver.
10. Clean seal seats and carefully install new seals. It is important that seals should be replaced in the same orientation to prevent leaks and accelerated wear.
11. Lubricate O-rings with “Parker-O-Lube” or equivalent. Only the spool shaft o-ring (13) should be lubricated with Bimba HT-99, or equivalent.
12. Assemble material outlet block (9), material inlet block (6) and air cylinder (3).
13. Thread socket head cap screws into assembled valve (10). Tighten uniformly to ensure correct valve alignment.
14. Insert the spring back into the air cylinder (2).
15. Insert piston/valve spool into valve body (4).
16. Install air fitting to end cap.
17. Install end cap to air cylinder (1). (HAND TIGHTEN ONLY)

SPARE PARTS

Valve Rear Section

• Recommended lubricant:
  “Parker-O-Lube”, or equivalent, except item 4 (TSD1400-008B) which requires Bimba HT-99, or equivalent. All O-Rings & seals must be lubricated with the exception of TSD400-69, which must remain dry.

Valve Front Section

• Recommended lubricant:
  “Parker -O-Lube”, or equivalent. All O-rings & seals must be lubricated with the exception of TSD400-69, which must remain dry.

REPAIR KITS

*These kits fit all variations of Techcon Systems High Pressure Spool Valves

Alternative Seals
Techcon Systems offers alternative seal materials for different applications. The standard seals installed in the valve are made of UHMWPE with an EPR o-ring.
Part number = TSD400-69

The following alternative seals are available:

STANDARD ACCESSORIES

OPTIONAL ACCESSORIES

FITTINGS AND TUBINGS

BRACKETS

TROUBLESHOOTING

is constant
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| Lower seal damaged or worn| Replace lower seal
Spool damaged| Replace spool
Inlet air fitting is too long, pushing the spool opened| Replace air fitting
Valve re-assembled incorrectly| Re-assemble valve, follow re- assembly instructions

LIMITED WARRANTY

Manufacturer 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. Manufacturer will repair or replace (at factory’s option), free of charge, any component of the equipment thus found to be defective, on return ofthe 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, prior to return. Send warranty returns to:

Americas and Asia
OK International
12151 Monarch Street
Garden Grove, Ca 92841

Europe
OK International
Eagle Close
Chandler’s Ford Ind Est
Eastleigh
Hampshire
SO53 4NF
United Kingdom

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

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