Mechanical seal john crane
Type 3740D
Dry Running Cartridge Split 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.
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.
Table Parameters Type 3740D
| Temperature Limits | 275°F/135°C
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|---|---|
| Pressure Limits | Vacuum to 80 psi(g) / 5.5 bar(g)
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| Speed Limits | 400fpm/2m/s
|
Features 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