Model 986, Automatic air release and vacuum valve, stainless steel 316Ti, for operating range: 0 – 250 PSI (17.2 Bar), outdoor application possible

Automatic and infinitely variable air valve for waste water applications.

Maximum Operating Pressure: 250 PSI (17.2 Bar)
Operating Range: 0 – 250 PSI (0 -17.2 Bar)

Valve seat does not contact the medium (air cushion). Two connections for effective flushing during maintenance work (top inlet flushing connection). All mechanical parts are manufactured of corrosion-resistant materials; valve body is epoxy-coated steel. Read and follow the operating and maintenance instructions. Please, mention the intended use for potable water application on the order form.

Valve Maintenance:

Air valves must be tested for function and maintained at least once per year. Valve must be shut off and flushed at both lateral connections.

Infinitely variable surge protection

In general understanding the surge protection of an ARV is a measure taken to protect the pipeline system. Filling of the pipeline should be within international standards to prevent water hammer (5ft/s) or (0,25m/s) and correct opening and closing of valves is fundamental.

The design of the H-TEC 986 ARV allows for large volumes of air (in/out). The unique function for infinite air release/intake, due to the automatic movements of the diaphragm in operation modus, (e.g. Fluid level rises, diameter of orifice is reducing infinitely variable) soft sealing and slowing the water column preventing water hammer.

Traditional ARV`s operate with two functions: open or closed. The rubber diaphragm of the H-TEC model 986 is infinitely variable operating. In case of increased velocity in the valve the float will lift slow and throttle down the air flow. This function slows the water column, water hammer from this ARV will not occur. The H-TEC 986 ARV has an integrated pressure spring on the vertical shaft attached to the float. This mechanical feature protects from vibrations, smooth function, prevents amplified movements. No additional surge prevention unit necessary

Material: Air valve body: stainless steel
Threaded connection: stainless steel
Float rod/spring: stainless steel
Float ball: POM
Outlet elbow: PE 100 with strainer of stainless steel
Medium Sewage
Order Nr.

Max Pressure





Medium Weight Specification Basket
250 PSI (17.2 bar) Stainless Steel 24.4" (620 mm) Thread 10.75" (273 mm) 2" FNPT 35,05 LBS
250 PSI (17.2 bar) Stainless Steel 24.4" (620 mm) Thread 10.75" (273 mm) 3" FNPT 35,94 LBS
250 PSI (17.2 bar) Stainless Steel 24.7" (627 mm) Flange 20.75" (273 mm) 2" ANSI 41,01 LBS
250 PSI (17.2 bar) Stainless Steel 24.7" (627 mm) Flange 10.75" (273 mm) 3" ANSI 46,08 LBS
250 PSI (17.2 bar) Stainless Steel 24.7" (627 mm) Flange 10.75" (273 mm) 4" ANSI 49,60 LBS
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