Split seals | Heavy-duty Cartridge Seal for Boiler Feed Circuit Applications
Features mechanical seal Type 3740XL
- California Residents: PROPOSITION 65 WARNING
- 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
- Factory-preassembled spring housing assembly for fast, easy seal face loading installation without the heavy gland plate
- Balanced primary ring design for increased pressure capability
- 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
- Two connections in the gland to provide easy access for flush piping
Recommended Applications Type 3740XL
- Process pumps
- Mixer and agitators
- Cooling towers
- Driven machinery
- Other rotating equipment
About Mechanical seal Type 3740XL
The Type 3740XL wet-running split seal is the extra large version of John Crane’s successful Type 3740 split seal that incorporates proven mechanical seal design features for fast and easy seal installation, while providing reliable seal performance in demanding large pump and other big rotating equipment fluid services.
Type 3740XL split seals are especially beneficial for use on large pumps and rotating equipment that are difficult and time consuming to disassemble for non-split seal installations & repairs or packing maintenance. These mechanical seals are commonly used in desalination, irrigation, mineral processing, power generation, pulp & paper and water/wastewater industries.
Design Features mechanical seal Type 3740XL
- 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, singlestep installation
- Factory-preassembled spring housing assembly for fast, easy
seal face loading installation - Balanced primary ring design for increased pressure capability
- 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 - Two connections in the gland to provide easy access for flush
piping
Material mechanical seal Type 3740XL
- Primary Ring Carbon Silicon Carbide
- Mating Ring Silicon Carbide
- Gland Plate Assembly 316 Stainless Steel Alloy 20
- Mating Ring Adapter Assembly Monel ®
Spring Adapter Assembly Set Titanium
Spring Housing Assembly Inconel ® 625 - Retaining Ring Alloy X-750
- Springs Alloy C-276
- Elastomers Ethylene Propylene – Fluoroelastomer
Operating range mechanical seal Type 3740XL
- Temperature Limits 250°F/121°C
- Pressure Limits 200 psi(g)/13.8 bar(g)
- Speed Limits 3500fpm/17.8m/s
Product Description Type 3740XL
The Type 3740XL extra large split seal uses the latest modular split seal technology from John Crane that is combined with the unique design requirements for wet-running services into a single split seal platform.
The Type 3740XL wet-running split seal is the extra large version of John Crane’s successful Type 3740 split seal that incorporates those proven design features for fast and easy seal installation, while providing reliable seal performance in demanding large pump and other big rotating equipment fluid services.
Type 3740XL split seals are especially beneficial for use on large pumps and rotating equipment that are difficult and time consuming to disassemble for non-split seal installations and repairs or packing maintenance, commonly used in desalination, irrigation, mineral processing, power generation, pulp and paper and water/ wastewater industries.
