BS 8520-1 / PAS 60-1 Compliant Wet Injection System

Enviro-Vac has introduced a wet injection system to the market, featuring adjustment-free needles.

Compliant with BS 8520-1 & PAS 60-1 the new system has superseded the conventional arrangement of manual flow adjustment at each needle - replacing it with a self-regulating "needle module". 100+ litre fluid reservoir Supplies up to 100 needles Self-regulating needle modules Independent lightweight control box Inside each needle-module is a unique pressure control valve which can deliver a consistent, balanced output of aqueous surfactant to each needle ensuring that the requirements of BS 8520-1 & PAS 60-1 are met. In conjunction with the needle-module a new pumped-surfactant delivery system has been developed, which: Is a robust, durable, all plastic construction. Features a pump capable of reliably delivering fluid even when the injection needles are elevated many meters above the pump unit. Allows needles to be used in any combination up to a maximum of 100 without compromising the flowrate at each needle.

Has a 100+ litre capacity translucent tank with capacity graduations. Will self-mix the surfactant. Incorporates multi-stage liquid-filtration to prevent surfactant-borne debris blocking the needles. Features factory-set automatic pressure regulating valves requiring no adjustment, so minimising the opportunity for operator error. Has a "Dwell-Time" feature for hard-to-wet materials, allowing a repeating cycle of 5 minutes of injection followed by 5 minutes waiting - to allow the fluid to be absorbed.

This can be overridden for constant injection or spray application. For work at different levels, the pump system can be left on the ground floor and a lightweight pressure control box taken to the higher levels - connected to the pump system by a single quick-release hose. The control unit compensates for changes in pressure-head which occur when needles are used at a different level from the pump unit, and ensures a consistent liquid flow of 35ml per minute (+/- 10%) is delivered to each needle..