Ball check valves are safety devices that protect pressurized pipelines against unwanted backflow. They are most commonly used on discharge risers in domestic wastewater and stormwater pumping stations.rainwater. The design and materials allow for wide use in installations inside wastewater pumping station tanks, on above-ground transmission pipelines, and also underground, both in vertical andand horizontal (maintaining the correct flow direction).
Features:
• Full-bore flow
• Self-cleaning ball
• Low sealing pressure
• Vertical and horizontal installation
• Quiet operation
• Inspection chamber for cleaning and replacing the ball
Technical data:
- The products meet the requirements of the following standards:
- EN1092-2 PN16 and AS4087, AS4087 (AS2129 Table E),
- ISO 228-1 for BSP threads,
- Category A, ISO5208 standard,
- EN558-1 series 48 (DIN3202 F6).
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Threaded valve diameter range: from DN25 (1”) up to DN65 (2-1/2”).
- Flanged valve diameter range: DN50 to DN100.
- Maximum working pressure: 16 bar.
- Minimum back pressure ensuring tightness: 0.3 to 0.5 bar.
- Test pressure:
- for the ball seat: 1.1 × nominal pressure,
- – for the body: 1.5 × nominal pressure.
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Operating temperature range: 10–80°C.
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The face-to-face length of the valves and the connection sizes of flanges and threads comply with the requirements of the standards listed above.
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The correct direction of liquid flow through the valve is indicated by the arrow on the body.
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The durable and simple design ensures long-term trouble-free operation.
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The valve closure (flap) is a smooth ball coated with a layer of wastewater-resistant EPDM. As the ball rotates freely in its seat, into which it is pushed by the liquid flow, the ball is cleaned of solid particles carried by the medium.
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The valves feature a bolted inspection cover for inspection and convenient cleaning if non-standard wastewater solids enter the valve.
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Dimensions
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DN - inches
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L
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H
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DN25 – 1”
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120
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65
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DN32 – 1¼”
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135
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75
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DN40 – 1½”
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145
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88
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DN50 – 2”
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174
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106
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DN65 – 2½”
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200
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125
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Materials:
- Body: ductile iron,
- Ball: steel/NBR,
- O-ring: EPDM,
- Inspection cover: ductile iron,
- Bolt: AISI 304 stainless steel,
- Nut: AISI 304 stainless steel,
- Washer: AISI 304 stainless steel.
