ADoST pinch valve improves permabond thread sealant dispensing, cuts adhesive wastage by 20% & eliminates valve clogging

This case study demonstrates how ADoST transformed a maintenance-intensive Permabond A131 thread sealant dispensing process into a stable, repeatable production operation for a leading CNG kit manufacturer.

By eliminating recurring valve clogging and reducing maintenance dependency, the customer achieved improved dispensing reliability, consistent thread sealant application quality, and stable production performance across high-volume assembly operations.

Following successful implementation on one assembly line, the customer standardized ADoST Pinch Valve technology across 8 additional assembly lines, establishing it as the preferred solution for Permabond thread sealant dispensing across their plant.

The customer is a leading manufacturer of automotive CNG fuel system components and kits used in passenger and commercial vehicle applications in India.

Their production involves critical threaded pneumatic and gas-flow connections requiring precise Permabond A131 anaerobic thread sealant application to ensure leak-proof and vibration-resistant performance in high-volume assembly operations. Given the safety-critical nature of CNG fuel connections, dispensing consistency and application reliability are non-negotiable requirements.

In these threaded connection assembly applications, the customer was dispensing Permabond A131 anaerobic thread sealant using a conventional wetting-type diaphragm valve. In a wetting-type valve, the anaerobic adhesive comes into direct contact with the valve mechanism. Permabond A131 and similar anaerobic thread sealants cure in the absence of oxygen — and when the valve is idle between cycles, anaerobic adhesive trapped inside the valve mechanism gradually cures, leading to blockage.

As production uptime increased, maintenance dependency and dispensing instability became major operational concerns, creating the need for a reliable, minimal-Permabond thread sealant dispensing solution suitable for continuous production operation.

To address recurring maintenance and dispensing reliability issues with Permabond thread sealant, ADoST implemented its non-wetting Pinch Valve technology designed specifically for demanding Permabond thread sealant dispensing applications.

Unlike a wetting-type diaphragm valve, the ADoST Pinch Valve keeps the anaerobic adhesive away from the valve’s internal mechanical components entirely. The adhesive contacts only a disposable pinch tube inside the valve body — never the valve mechanism itself. This eliminates the root cause of clogging: there is no valve surface for the anaerobic thread sealant to cure against.

The solution enabled stable, repeatable dispensing without modifications to the customer’s existing dispensing infrastructure. The ADoST Pinch Valve was integrated directly, replacing only the valve component on the existing dispenser setup.

After implementation of the ADoST Pinch Valve, the customer observed the following outcomes in their Permabond thread sealant dispensing operation:

Most importantly, the dispensing stability and low-maintenance performance achieved after the initial implementation led the customer to standardize ADoST Pinch Valves across 8 additional assembly lines handling similar anaerobic adhesive dispensing applications — a direct reflection of confidence in the solution’s reliability at scale.

Following successful implementation on one assembly line, the customer standardized ADoST Pinch Valve across 8 additional lines, reflecting strong confidence in its reliability and maintenance-free performance in permabond thread sealant dispensing applications involving Permabond A131 and similar anaerobic adhesive grades.

This case highlights how the right dispensing valve technology can significantly improve manufacturing reliability, reduce maintenance dependency, and optimize adhesive utilization in high-volume anaerobic adhesive dispensing operations — particularly where conventional wetting-type diaphragm valves are failing to deliver consistent performance.

Explore the ADoST Pinch Valve or book a free technical consultation to evaluate the solution for your anaerobic adhesive dispensing application.