Type FDP/A (plain pipe) 8 sizes from 50mm to 150mm outside pipe diameter.

Type FDF/A (flanged) 8 sizes from 50mm to 250mm nominal bore.

Self-adjusting parabolic flap with polyurethane or silicone seals seating onto fully machined surfaces for efficient sealing.

Minimal change in cross-section area for optimum performance.

Housing available in cast iron, aluminium or stainless steel.

Positive conveying pressures to 1-barg and vacuum systems to -300 mbarg.

Standard operating temperatures from -10°C to +80°C (Polyurethane flap seals)

-20°C to +230°C (optional silicone rubber flap seals).

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