Our purpose would be to give good quality items at competitive rates, and top-notch service to consumers around the world. We are ISO9001, CE, and GS certified and strictly adhere to their quality specifications for John crane Type 21 mechanical seals for marine pump, Remember to deliver us your specifications and specifications, or truly feel cost-free to contact us with any questions or inquiries that you may have.
Our purpose would be to give good quality items at competitive rates, and top-notch service to consumers around the world. We are ISO9001, CE, and GS certified and strictly adhere to their quality specifications for Pump Mechanical Seal, Standard Mechanical Seals, Type 21 Mechanical Seal, Water Pump Shaft Seal, They are sturdy modeling and promoting effectively all over the world. Never ever disappearing major functions within a quick time, it’s a have to to suit your needs of fantastic good quality. Guided by the principle of Prudence, Efficiency, Union and Innovation. the corporation. ake an excellent efforts to expand its international trade, raise its organization. rofit and raise its export scale. We’re confident that we’re going to have a bright prospect and to be distributed all over the world in the years to come.
Features
• The drive band’s “dent and groove” design eliminates overstressing of the elastomer bellows to prevent bellows slip and protect the shaft and sleeve from wear
• Non-clogging, single-coil spring provides greater dependability than multiple spring designs and will not foul due to fluid contact
• Flexible elastomer bellows automatically compensates for abnormal shaft-end play, run-out, primary ring wear and equipment tolerances
• Self-aligning unit automatically adjusts for shaft end play and run-out
• Eliminates potential shaft fretting damage between the seal and shaft
• Positive mechanical drive protects the elastomer bellows from overstressing
• Single coil spring improves tolerance to clogging
• Simple to fit and field repairable
• Can be used with practically any type of mating ring
Operation Ranges
• Temperature: -40˚F to 400°F/-40˚C to 205°C (depending on materials used)
• Pressure: up to 150 psi(g)/11 bar(g)
• Speed: up to 2500 fpm/13 m/ s (depending on configuration and shaft size)
• This versatile seal can be used on a wide range of equipment including centrifugal, rotary and turbine pumps, compressors, mixers, blenders, chillers, agitators, and other rotary shaft equipment
• Ideal for pulp and paper, pool and spa, water, food processing, wastewater treatment, and other general applications
Recommended Application
- Centrifugal Pumps
- Slurry Pumps
- Submersible Pumps
- Mixers & Agitators
- Compressors
- Autoclaves
- Pulpers
Combination Material
Rotary Face
Carbon graphite resin impregnated
Silicon carbide (RBSIC)
Hot-Pressing Carbon C
Stationary Seat
Aluminium oxide (Ceramic)
Silicon carbide (RBSIC)
Tungsten carbide
Auxiliary Seal
Nitrile-Butadiene-Rubber (NBR)
Fluorocarbon-Rubber (Viton)
Ethylene-Propylene-Diene (EPDM)
Spring
Stainless Steel (SUS304, SUS316)
Metal Parts
Stainless Steel (SUS304, SUS316)
Type W21 DIMENSION DATA SHEET (INCHES)
Type 21 pump mechanical seal, water pump mechanical seal, pump mechanical seals,
