BT-RN Balanced

BT-RN Balanced
Item Description
1 Seal face
2 Stationary seat
3, 3a O-Ring
4 Spring
A Spacer (upon request)

BT-RN.NB has an installation length l1N in accordance with EN 12756 (normal length).
BT-RN.KB has an installation length l1K in accordance with EN 12756 (short length).

BT-RN Balanced

Features

  • Single pusher-type seal
  • Balanced
  • Conical spring
  • Dependent on direction of rotation
  • Short length (KB)
  • Normal length (NB)

Advantages

The BT-RN.NB/KB represents a traditional pusher seal and is the balanced version of a BT-RN. Designed for high pressure fluids, it is made from the same material range as the BT-RN. The main characteristic is a short design combined with an economical seal solution. Length and dimensions according to EN 12756 (RN.NB normal length, RN.KB short length).

Operating range

Shaft diameter:
d1 = 10 … 100 mm (0.39" … 3.94")
Pressure: p1* = 25 (40) bar (363 (580) PSI)
Temperature:
t* = -35 °C … +180 °C (-31 °F … +292 °F)
Sliding velocity: vg = 15 m/s (49 ft/s)

* Dependent on medium, size and material

Materials

Seal face:
CrNi steel 1.4057 (F1), CrNiMo steel 1.4401 (G), Tungsten carbide (U)
Seat:
Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Tungsten carbide (U) Elastomers: NBR (P), EPDM (E), FKM (V), FFKM (V)
Metal parts: CrNiMo steel (G), CrNi steel (F, F1)

Standards and approvals

  • KTW
  • W270
  • ACS
  • WRAS
  • NSF
  • FDA
  • DM 174/04

Notes

Seat ring of alternative seats can be supplied with short tail or with pin to block the seat and prevent seat rotation.



Product variants

BT-RN3.NB / KB

Seal faces made of brazed tungsten carbide which is suitable for media with medium corrosive and abrasive characteristics.

Item Description
1 Seal face housing
1a Brazed seal face
2 Stationary seat housing
2a Brazed stationary seat
3, 3a O-Ring
4 Spring
A Spacer (upon request)
True