Model 988 F4"r, Automatic air release and vacuum valve, Infinitely variable surge protection, stainless steel 316Ti (Tested maximum pressure 375 PSI)
Technical features
| Connection | Flange |
| Operating pressure | 250 PSI (17.2 bar) |
| Max. operating venting | 258,97 cfm (440 m³/h) |
| ventilation cross-section | 12,63 in² (8.150 mm²) |
| Continuous operation | yes |
| Max. venting capacity | 1294,87 cfm (2200 m³/h) |
| Flushing connection | yes |
| Area of application | Plant engineering, Raw Water, Reclaim Water, Industrial application |
| Notice 1 | Tested maximum pressure 375 PSI |
Materials
Air valve body: stainless steel
Valve basket: POM
Dirt deflector: PP
Float spindle: stainless steel
Pressure spring: stainless steel
Float: POM
Valve basket: POM
Dirt deflector: PP
Float spindle: stainless steel
Pressure spring: stainless steel
Float: POM
Further information
Description
Downloads
Description:
Features:
Automatic and infinitely variable air valve for waste water applications.
Recommended for outdoor application.
Maximum Operating Pressure: 250 psi (17.2 bar).
Operating Range: 0 – 250 psi (0 - 17.2 bar).
Patented valve seat does not contact the medium (air cushion).
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 F4”r 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 988 F4”r 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 988 F4”r 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.
Automatic and infinitely variable air valve for waste water applications.
Recommended for outdoor application.
Maximum Operating Pressure: 250 psi (17.2 bar).
Operating Range: 0 – 250 psi (0 - 17.2 bar).
Patented valve seat does not contact the medium (air cushion).
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 F4”r 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 988 F4”r 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 988 F4”r 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.
Notes:
- Tested maximum pressure 375 PSI
Videos
Operating Instructions
Technical Documents
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