Seal Refurbishment Services

Elastomer Chemical Compatibility

Seal Face Chemical Compatibility

MULTI-SPRING SEALS

H8TB / H9TB

  • Narrow cross-section
  • Multi-spring arrangement
  • Suits imperial sizes
  • Balanced

H8TB is the narrow cross-section version of H8B. It is balanced in design and originally used a PTFE wedge as the secondary seal, a more cost-effective option using o-rings is now more commonplace (H8TB).

 

The original PTFE wedge design is still available if required (H9TB).

  • Operating conditions

Temperature:

Pressure:

Speed:

-40°C to 260°C

up to 83 bar, 1200 psi

up to 25m/s, 5000 fpm

  • Material options

H9B - PTFE WEDGE

PARTS

A

B

C

D

E

F

G

H

I

J

Seat O-ring

Seat (OG Standard)

Rotary Face

Snap Ring

Metal Housing

O-ring (H8TB)

Disc

Multi-Spring

Set Screw

PTFE Wedge

Rotary Face:

Stationary Face:

Elastomer:

Metal Parts

CAB, A1. CAB, SiC

SiC

N, V or EP

Stainless Steel

EQUIVALENT

Type 8B1T / 9BT

M06SU / M06U

1645BS / 1645B

STANDARD SEAT

OG

W

US imperial o-ring seat

UK imperial o-ring seat

DATA SHEET

H8TB - Data Sheet

TYPE 8B1T - LOW PROFILE

PRODUCT INFORMATION

DIMENSIONS

note: dimensions refer to installed length, not 'free' length