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Seal Proof

Multi Spring Seal

Slip-on hydraulically balanced seal in types 707 and 808, interchangeable with conventional seals.

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Size range — type 707
16 to 150mm
Pressure — type 707
35 bar
Temperature — type 707
205°c
Seal Proof multi spring mechanical seal — a ring of small springs distributed around the seal head.

Overview

A directly slip-on, hydraulically balanced seal design offering near-universal interchangeability with conventional seals and gland packings, without modification to the pump or gland.

Because no seal-induced shaft damage occurs, the hidden maintenance cost of shaft and sleeve repair or renewal is avoided. A high degree of standardisation keeps the price below conventional seals, and a uniform installation dimension across all sizes makes handling easier.

Two application-data sets are published: seal type 707 and seal type 808.

Specifications

Size range — type 707
16 to 150mm
Pressure — type 707
35 bar
Temperature — type 707
205°c
Size range — type 808
108mm to 150mm
Pressure — type 808
35 bar
Temperature — type 808
205°c

Note: Material spellings normalised from the legacy page: "Tungesten" → Tungsten, "Silicon Caribide" → Silicon Carbide, "Neoperene" → Neoprene. No material was substituted.

Contact our engineering team for application-specific specifications.

Materials of construction

  • Type 707 seal faces: Carbon, Stellite, Plasma Sprayed Ceramic, Tungsten Carbide, Silicon Carbide
  • Type 707 elastomers: EPDM, Neoprene, Viton, TEV, Kalrez
  • Type 808 seal faces: Carbon, Stellite, Plasma sprayed ceramic, Tungsten carbide, Silicon carbide
  • Type 808 elastomers: Viton®, Neoprene, Kalrez®, EPDM, TEV

Applications

  • Industrial
  • Marine

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Next step

Tell us the duty.

Media, temperature, pressure, shaft size and speed are usually enough for our engineers to specify multi spring seal for your equipment.

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