We insist on offering good quality production with good small business concept, honest income plus the ideal and fast service. it will bring you not only the premium quality solution and huge profit, but by far the most significant should be to occupy the endless market for single spring mechanical seal Type 21 for marine pump, With a wide range, good quality, realistic charges and stylish designs,Our products and solutions are widely recognized and trusted by users and can fulfill continuously changing economic and social needs.
We insist on offering good quality production with good small business concept, honest income plus the ideal and fast service. it will bring you not only the premium quality solution and huge profit, but by far the most significant should be to occupy the endless market for Marine Pump Seal, Mechanical Pump Seal, Type 21 Mechanical Seal, Water Pump Shaft Seal, Now, with the development of internet, and the trend of internationalization, we’ve decided to extend business to overseas market. With the propose of bringing more profits to oversea customers by providing directly abroad. So we’ve got changed our mind, from home to abroad, hope to offer our customers more profit, and looking forward to more chance to make business.
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)
single spring mechanical seal, type 21 pump seal, mechanical pump seal
