Type-3740D-john-crane

Spilt seals | Heavy-duty Cartridge Seal for Boiler Feed Circuit Applications

Type-3740D-john-crane

Features mechanical seal Type 3740D

  • California Residents: PROPOSITION 65 WARNING
  • Suitable for use in equipment according to 94/9/EC (ATEX 95) Group II, Category 2 GD
  • Factory-preassembled rotor assembly for fast, easy yet precise rotating face installation
  • Separate stationary seal face for visual assurance the halves are correctly aligned
  • Factory-preassembled gland plate assembly for easy, single-step installation
  • Enhanced runout capability for large radial shaft movements
  • Premium seal face materials for optimal performance
  • Temporary wet-running allowable
  • Captive socket head cap screws to eliminate lost or dropped screws
  • Same-side screws on all hardware for easy access and faster installation
  • Dovetail O-ring grooves to contain all O-rings without requiring adhesives
  • Fast and easy field repair kits that do not require any special tools, adhesives or procedures

Recommended Applications Type 3740D

  • Mixer and agitators
  • Driven machinery
  • Other rotating equipment

About Mechanical seal Type 3740D

The Type 3740D dry-running split seal is a mechanical seal designed for the large shaft run-out and harsh operating conditions commonly associated with top-entry vessel mixing services and other dry-running applications. Type 3740D dry-running split seals are suitable for use in equipment according to 94/9/EC (ATEX 95) Group II, Category 2 GD.

The Type 3740D is part of the 3740 Series of split seals, which includes the Type 3740 wet-running split seal. These split seals use the latest modular split seal technology from John Crane that combines the unique design requirements for wet-running and dry-running services onto one common seal platform.

Design Features mechanical seal Type 3740D

  • Factory-preassembled rotor assembly for fast, easy, yet
    precise rotating face installation
  • Separate stationary seal face for visual assurance the halves
    are correctly aligned
  • Factory-preassembled gland plate assembly for easy, single-step installation
  • Premium seal face materials for optimal performance
  • Captive socket head cap screws to eliminate lost or dropped
    screws
  • Same-side screws on all hardware for easy access and
    faster installation
  • Dovetail O-ring grooves to contain all O-rings without
    requiring adhesives
  • Fast and easy field repair kits that do not require any
    special tools, adhesives or procedures
  • Enhanced runout capability for large radial shaft movements
  • Temporary wet-running allowed

Material mechanical seal Type 3740D

  • Primary Ring Carbon
  • Mating Ring Ceramic
  • Gland Plate Assembly
    Mating Ring Adapter Assembly
    Spring Adapter Assembly Set
    316 Stainless Steel Alloy 20 Monel ®
    Titanium Inconel ® 625
  • Retaining Ring Alloy X-750
  • Springs Alloy C-276
  • Elastomers Ethylene Propylene
    Fluoroelastomer

Operating range mechanical seal Type 3740D

  • Temperature Limits
    275°F/135°C
  • Pressure Limits

    Vacuum to 80 psi(g) / 5.5 bar(g)

  • Speed Limits

    400fpm/2m/s

Product Description Type 3740D

The Type 3740 is a family of split seals using the latest modular split seal technology from John Crane that also combines the unique design requirements for wet-running and dry-running services onto one common seal platform.

  • The Type 3740D dry-running split seal is designed for the
    large shaft run-out and harsh operating conditions commonly associated with top-entry vessel mixing services and other dry-running applications.
  • The Type 3740 wet-running split seal incorporates the best
    features for fast and easy seal installation, while providing
    reliable seal performance in demanding pump and other
    rotating equipment fluid services