ALFA LAVAL® MECHANICAL SEALS

H87D

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

H87D replaces the "R90" and "T87" double mechanical seals found in Alfa Laval SRU Rotary Lobe Pumps, as well as older SSP - SR & NMOG Ranges.

 

A H87 base with an added inboard face holder allows back-to-back mounting and containment of a high pressure lubricating barrier fluid.

 

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

  • Operating conditions¹

PARTS

A

B

C

D

E

F

G

H

I

Inb. Stationary O-ring

Inb. Stationary Holder

Inb. Stationary Face

Inb. Rotary Face

Inb. Rotary O-ring

Inb. Rotary Holder

Inb. Wave Spring

Set Screws

H87 Base

EQUIVALENT

Type 87 D(EI/EC), T87D

RTH87 / R90

Type 1694

W03SU

Temperature:

Pressure:

Speed:

-30°C to +260°C

< 17 bar, 245 psi, 1.7 MPa

< 20m/s, 4000 fpm

rpm < 1200000/(3.14 x D1)

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

DATA SHEET

H87D - Data Sheet
  • Material options

Seal Faces:

Elastomers:

Metal Parts:

all (TC) or (SiC)

N, V or EP

316S.S.

(_) refers to shrink fitted

other combinations available on enquiry

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®.

T87 / R90 - DOUBLE SEAL

PRODUCT INFORMATION

DIMENSIONS

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

PUMP COMPATIBILITY

Replaces the double mech. seals in Alfa Laval® pumps:

 

SR & SRU Ranges:

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

 

NMOG, LKPL, TSR & GHPD Ranges:

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