Instructions Dispensit 1230 Dispense Valve Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions.
WELCOME Thank you for purchasing a Dispensit 1230 Series Positive Displacement Dispense Valve. This manual explains the steps for proper setup, operation, and maintenance of the dispense valve. This manual is an overview of the valve and how it works. You have also received (where applicable), other manufacturer’s guides and technical references that detail the specifics of their particular products which have been integrated into the dispense valve.
Table of Contents Introduction .................................................................................................................................................... 4 Safety Precautions .......................................................................................................................................... 5 Main Components ..........................................................................................................................................
Introduction This manual is for the 1230 Series Positive Displacement Dispense Valves, designed and manufactured by Dispensit. This manual addresses the setup, operation, maintenance and adjustment of all aspects of the valve, which will be useful for management, support technicians as well as the operator.
Safety Precautions This manual provides installation, operation, and maintenance instructions for Graco Ohio Inc. meter, mix, and dispense machines. Read this manual before you install and operate your machine. Use your machine only as directed. Safety Terms within our manuals Cautions are given where failure to observe the instruction could result in damage to the equipment, associated equipment, and/or process.
Safety Precautions (Cont’d) Dispensit recommends, as many companies require, that the primary air source to the dispense valve be disconnected before being serviced. It is the users responsibility to ensure that the primary air pressure is OFF. If the valve is controlled by an electrical system, (e.g., solenoid valve or PLC), the electrical system should be placed in a position where the air supply to the dispense valve is OFF.
Main Components As figure 2 shows, the main components of the 1230 dispense valve are easily recognized. For more valve specifics, refer to p11-1, . AND ACCESS TO THE WET CUP FOR FILLING Figure 2. Main Components: The main components of the 1230 dispense valve are easily recognizable and accessible. Detailed drawings can be found in the back of this manual.
Valve Operation Figure 3 is an illustrated description of the sequential steps in the cycling of the 1230 dispense valves. Material fills the valve through the material inlet port located on the inlet block and fills the spool and dispense chamber. Air is supplied to the dispense port which moves the metering rod down. The metering rod moves down, pushing material through the diaphragm check valve, and out the dispense needle. Air is shifted back to the fill position.
Optional Equipment 5.1 Controller Operation of the 1230 dispense valve, requires the use of a pneumatic, cycle sequencing, controller. Dispensit offers the optional 4134 Pneumatic Controller, as seen in figure 4, which when triggered by either a foot switch or toggle switch, can control the dispense valve and the optional Dispensit 1105 Z-Lift station.
Valve Disassembly 6.1 Removing the Valve To remove the valve from its work position requires a few steps to assure that the valve can be replaced in the same manner. Use care when servicing! This valve contains plastic components. Complete these few steps to remove the dispense valve: • Purge residual pressure from material line, and then remove the material line from the dispense valve. • Carefully remove the incoming air line from the diaphragm. Do not break the plastic barbs.
Valve Disassembly (Cont’d) 6.3 Main Sections The 1230 Valve can first be broken down into two main sections, the “Power Head”, and the “Wet Head.” For simplicity sake, this manual will describe the procedures for a valve containing a luer-lock needle and adapter. To disassemble the 1230 into its main sections, refer to figure 6 and follow these steps. 1. Remove the Luer-Lock Adapter (24) and with the Luer-Lock Needle (25) from the bottom of the Valve. 2.
Valve Disassembly (Cont’d) 6.4 Power Head Section Typically the power head section will only require servicing if material leaks into the air chamber or the air chamber is leaking pressurized air. To disassemble the Power Head Section follow these steps. It is not necessary to remove the air lines if still attached. Refer to figure 7 for part orientation. 1.
Valve Disassembly (Cont’d) 6.5 Wet Head Section To disassemble the Wet Head Section follow these steps. It is necessary to remove the air line from the diaphragm barb fitting. Refer to figure 8 for part orientation. 1. Pull the Metering Rod (14) from the top of the Wet Head Section (14). 2. Remove the Internal Snap Ring (15) from the top of the Wet Head. 3. With a small dull dental pick, remove and keep the Washer (16) and remove and discard the High Pressure Seal (17) from the top of the Wet Head Section.
Subassemblies 7.1 Component Cleaning WARNING: Clean the valve components with a solvent or cleaner that is compatible with the material that was dispensed through the valve. Personal injury or damage to the valve may occur if the wrong cleaner or solvent is used. With the valve completely disassembled, the individual components can be cleaned. Using a solvent or cleaning solution that is compatible with the material dispensed with this valve, thoroughly clean all the components.
Subassemblies (Cont’d) 7.2 Seal Replacement NOTICE: Do not cut, tear or damage the Seals when installing them. The slightest nick or cut will cause the valve to leak. 7.2.2 Wet Head Install a High Pressure Seal (17) with the “O” Ring side facing in, into the smaller pocket in the top of the Wet Head (18). Place the plastic Washer (16) over the High Pressure Seal and gently press the two components into place. Refer to figure 12 for the proper component orientation.
Valve Assembly 8.1 Final Assembly Complete the following steps to assemble the Power Head and Wet Head to the Base Section. Refer to figures 16 and 17 for the proper orientation of these parts. 1. Attach the Power Head Assembly (A) to the top of the Base Section (8) by sliding it into the Base section. Align the two sections with the cut outs on the same side, and secure them together with two BHCS (9).
Operation Adjustments Adjust the Dispense Head for proper operation as follows. See step 6 for volume adjustment. 1. Make sure that all the Dispense Head pneumatic connections are in place. 2. Fill wet cup (if equipped) with compatible material. 3. Connect the material for dispensing. Position a container to catch the dispensed material. Cycle the Dispense Head until you are getting consistent dispensing (no inconsistencies in the dispensed material, symmetrical deposit shape). 4.
Troubleshooting Although good housekeeping, preventive maintenance and proper operating procedures will lengthen the life of the valve, all mechanical devices will develop problems from normal wear. Following are some of the possible difficulties and likely causes that may arise with the valve. If these do not correct the situation, call the technical service department at Dispensit®. Problem Nothing Happens Valve Cycles but Material is Not Dispensed Possible Cause Solution 1.
Glossary of Terms Not all terms listed below are part of your system. ANSI (American National Standards Institute): an association of industry representatives which develops technical standards including safety. These standards comprise a consensus from a variety of industries on good practice and design. ANSI standard relevant to Dispensit is ANSI/RIA R15.06 (industrial robots and robot systems).
Glossary of Terms (Cont’d) OSHA (Occupational Safety and Health Administration): a division of the U.S. Department of Labor, responsible for the regulation of workplace safety. OSHA regulations often follow ANSI standards which become law when adopted by OSHA and must be followed. PLC (PROGRAMMABLE LOGIC CONTROLLER): an electronic device used to decipher electrical signals from input devices and energizes output devices.
Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
