The NM-4 is a compact and efficient Rubber Bellow Mechanical Seal, widely used in high-volume water pump applications. Its simplified design allows for easy installation and reliable performance in confined spaces.

The seal features a friction-locked bellows connection that protects the shaft and compensates for axial movement. It is an ideal cost-effective solution for domestic water supply pumps, swimming pool pumps, and simple centrifugal pumps.

Seal faces materials:

• Resin impregnated carbon (В)
• Silicone carbide(Q₁, Q₂)
• Ceramic Al₂O₃ (V)

Elastomers:

• Fluorcarbon rubber, FKM (V)
• Nitrile-butadiene-rubber (P)
• Ethylene propylene rubber, EPDM (E)

Operation conditions:

• p = 10 bar
• t = -20 … 140°C
• v = 10 m/s

Type: Rubber bellow seal
Replacement: Burgmann BT-AR , AES B01