The Henkel LOCTITE 97152 is a dual-channel digital dispensing valve controller purpose‑built for automated assembly lines in automotive, electronics, and industrial manufacturing. It combines a microprocessor‑based control core with an integrated solenoid valve module and precision pressure regulator, enabling independent actuation of 1 to 2 LOCTITE dispensing valves with digital pressure monitoring and programmable dispense profiles. The graphic LCD display provides real‑time visualization of reservoir pressure, program step number, dispense status, and online flow monitor dynamics. Four independent dispense programs can be stored in memory—each with its own dispense time, pressure, and peripheral activation settings—allowing rapid product changeover without reprogramming. A built‑in PLC interface and standard serial interface enable full integration into automated production systems, with collective fault signaling (ready/refill/empty) to the host controller for statistical process control (SPC) and quality documentation.

How the Dual-Channel Architecture Works

• Two Independent Dispensing Channels: The 97152 can simultaneously actuate up to two LOCTITE dispensing valves, each with independent timing and pressure parameters. This is ideal for applications requiring dual‑component dispensing (e.g., applying threadlocker to one fastener and retaining compound to another on the same part) or for single‑valve operation with a second channel configured for peripheral control. The integrated solenoid valve module eliminates the need for external pneumatic valve banks, reducing air line connections and simplifying setup and teardown.
• Peripheral Device Ecosystem: Beyond valve actuation, the 97152 interfaces with a range of LOCTITE peripheral devices: product reservoirs with low‑level and empty sensors (e.g., 2.0L reservoir), advancing slides, electric rotorsprays, online flow monitors, and pre‑amplifiers. Each peripheral can be individually activated or deactivated via the system and channel menus, allowing flexible system configurations—from a basic single‑valve setup to a fully equipped dispensing station—without installing additional control hardware.

Precision Regulator, Programmable Logic, and Traceability for Automated Assembly

• Precision Pressure Regulation with Digital Readout: Reservoir pressure is precisely regulated by a mechanical precision pressure regulator and monitored continuously by a digital pressure transducer. The digital pressure readout eliminates the guesswork of analog gauges: the exact reservoir pressure is displayed numerically on the graphic LCD, along with dispense time and channel status. This ensures that the amount of product dispensed—determined by reservoir pressure (1–100 psi output) and the length of time the dispensing valve remains open (0.01–99.9 s)—remains consistent cycle after cycle, regardless of fluctuations in facility air supply.
• 4 Storable Dispense Programs for Rapid Product Changeover: The controller can internally store up to four independent dispense programs, each associated with a specific part number. Programs can be recalled instantly via the membrane keypad or remote PLC commands. This is critical for high‑mix manufacturing lines where a single workstation dispenses different adhesives (e.g., threadlocker for one product, retaining compound for another) on different parts throughout a shift. Operators no longer need to memorize or re‑enter dispense parameters for each product variant—eliminating setup errors and reducing changeover time.
• Online Flow Monitor for Real‑Time Quality Control: When coupled with a LOCTITE online flow monitor and pre‑amplifier, the 97152 can receive real‑time flow data from each channel and display it graphically on the LCD. This allows the operator to monitor the dynamic flow profile of each dispense cycle and detect deviations—such as a partially clogged nozzle or an air bubble in the adhesive line—before they result in defective product. Flow data can also be transmitted via the standard serial interface to a PC for long‑term SPC analysis, quality documentation, or maintenance trend monitoring. The same interface can query data records for audit purposes, supporting ISO 9001 and IATF 16949 compliance.
• Reduced PLC Load in Automated Lines: The built‑in PLC interface relieves the primary machine controller from time‑critical dispensing control tasks. The 97152 handles all local dispense sequencing—valve open/close timing, pressure monitoring, peripheral activation—and reports a simple set of status signals (Ready, Refill, Empty, collective Fault) back to the host. This separation of concerns simplifies PLC programming and reduces I/O point consumption on the primary controller.
• Multi‑Level User Access and Manual Operation Mode: The controller supports a multi‑level user security system, allowing supervisors to lock access to critical parameter settings while operators can still select programs and initiate dispense cycles. The MANUAL OPERATION menu provides a controlled environment for setup adjustments, maintenance diagnostics, and individual step testing: the operator can manually trigger a dispense valve, activate an advancing slide, or initiate a rotorspray for testing purposes without affecting the active production program.

Applications

• Threadlocking and thread‑sealing of fasteners in automotive powertrain and chassis assembly
• Gasketing and flange‑sealing with LOCTITE anaerobic and silicone products in engine and transmission manufacturing
• Retaining compound application for bearing and bushing assembly in electric motor and gearbox production
• Bonding and sealing in electronics assembly (underfill, encapsulation, conformal coating) with LOCTITE precision dispensing systems
• Any automated assembly application requiring dual‑channel dispensing control with PLC integration, programmable recipes, and traceable quality data