ALFA LAVAL® MECHANICAL SEALS

H87

  • O-ring, Wave-Spring Pusher
  • Compact, Bi-directional
  • Suits Alfa Laval® SRU Pumps

H87 replaces the "R90" and "T87" mechanical seals found in Alfa Laval SRU Rotary Lobe Pumps, as well as older SSP - SR & NMOG Ranges.

 

The compact o-ring design relies on a wave-spring for axial compression and is set-screwed to the shaft. Slots in the stationary engages with the pump housing to provide anti-rotation.

 

Each pump requires two identical seals, one for each shaft.

  • Operating conditions¹

Temperature:

Pressure:

Speed:

-30°C to +260°C

< 10 bar, 145 psi, 1 MPa

< 13m/s, 2500 fpm

rpm < 780000/(3.14 x D1)

PARTS

A

B

C

D

E

F

G

H

I

J

Stationary O-ring

Stationary Face / Ring

Rotary Face / Ring

Rotary O-ring

Rotary Drive Collar

Rotary Set Screws

Rotary Wave-Spring

Stationary Holder

Stationary Face / Ring

Rotary Face / Ring

EQUIVALENT

Type 87 (EI/EC), T87

RTH87 / R90

Type 1682

W03SU

DATA SHEET

¹Guide-values only (due to diversity of possible applications). Enquire for specific-use cases. Maximum values of each parameter cannot be applied together.

H87 - Data Sheet
  • Material options

Rotary Face:

 

Stationary Face:

 

Elastomer:

Metal Parts:

316S.S or TC

(SiC) or (TC)

CER, SiC or TC

(CAB), (SiC) or (TC)

N, V or EP

316S.S.

(_) refers to shrink fitted

OEM names, brands, model or part numbers are used solely for reference. Our components are engineered to deliver performance and service life equivalent to or exceeding that of OEM parts when correctly installed and appropriately applied. Alfa Laval® is a registered trademark of its respective company. Pump Seal Supplies Pty Ltd are not representative of, nor affiliated with Alfa Laval®.

TYPE 87 / R90 - SINGLE SEAL

PRODUCT INFORMATION

DIMENSIONS

Dimensions refer to installed length, not 'free' length:

PUMP COMPATIBILITY

Replaces the mechanical seals in Alfa Laval® pumps:

 

SR & SRU Ranges:

Replaces the OEM "T87" & "R90" mechanical seals

 

NMOG, LKPL, TSR & GHPD Ranges:

Replaces the OEM "T87" & "R90" mechanical seals