This website uses cookies to ensure users have the best online experience. By continuing to browse this website, you are giving your consent to the use of cookies. To learn more, read our privacy policy. X
< Back to O-ring Pusher Seals

Type SEW

Single Mechanical Seals for Sulzer Process Pumps

Type SEW is a seal operating on a non-pressurized water quench principle. It is designed for the most demanding applications in the pulp industry, where reliable and long-lasting operation is required from a seal. Typical applications include stock pumps at pulp mill washing and screening facilities, as well as high-temperature condensate pumps.

Features

  • California Residents: PROPOSITION 65 WARNING
  • Balanced design — undisturbed operation even with sudden pressure shocks.
  • Heat shrunk seal faces — ensures correct face alignment at all temperatures recommended for this seal.
  • Spring located in a stationary body — shaft misalignment does not pump up the spring or wear out the O-ring.
  • Installation against the shaft shoulder — easy installation reduces risk of human error. No measurements required for installation.
  • No drive pins at seals — seal face does not crack at start-up.
  • Available in different materials — selection covers all possible single-seal applications.
  • Non-pressurized seal water quench — possible to cool seal with non-pressurized seal water at high temperatures. A V-ring prevents water leakage from the seal.
  • By using a Sulzer Scanpump cartridge tool, the seal becomes a true cartridge seal.
  • Available with grease lubrication — the Safeseal Type SEW can be used with grease quench to save seal water.

Parameters

Temperature Limits

300°F/150°C

Pressure Limits

Process pressure: 215 psi(g)/15 bar(g)

Speed Limits

65fps/20m/s

Standard Materials

Seal faces: SiC/Carbon or SiC/SiC

O-rings: PTFE, EPDM, Viton

Metals: AISI 329 (standard), titanium, UHB

Springs: Nimonic steel

V-ring: Nitrile

Recommended Applications

  • Process pumps
  • Other rotating equipment

Contact Us