Seal Refurbishment Services

Elastomer Chemical Compatibility

Seal Face Chemical Compatibility

MULTI-SPRING SEALS

H8U / H9U

  • Multi-spring arrangement
  • Suits imperial sizes
  • Unbalanced

H8U is a multi-spring seal for imperial shaft sizes commonly used in chemical pumps. Originally designed to use a PTFE wedge as the secondary seal, a more cost-effective option using o-rings is now more commonplace (H8U).

 

The original PTFE wedge design is still available if required (H9U).

  • Operating conditions

Temperature:

Pressure:

Speed:

-40°C to 260°C

up to 24 bar, 350 psi

up to 25m/s, 5000 fpm

  • Material options

H9U - 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 (H8U)

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 8-1 / 9

M01SU / M01U

1609S / 1609

STANDARD SEAT

OG

W

US imperial o-ring seat

UK imperial o-ring seat

DATA SHEET

H8U - Data Sheet

TYPE 8-1 - UNBALANCED

PRODUCT INFORMATION

DIMENSIONS

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