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DAR stocks variety of single spring seals for pumps and compressors. Choose from the list below for a seal that fits your application.   

Type C

Mechanical Seals

These stainless steel mechanical face seals, also known as pump shat seals or mechanical shaft seals, are designed for OEM and replacement parts on chemical and fertilizer pumps, trash pumps, pressure booster pumps, straight centrifugal pumps, sump pumps and home water systems. The seal components are locked together by a crimped outer shell, providing a unitized construction for the diaphragm and drive gasket. This prevents reverse thrusts from dislodging the seal components. This mechanical lock eliminates the need for adhesives, thereby eliminating leaks between the seal ring and the diaphragm. All springs and spring retainers are 304 stainless steel. all other parts are type 304 stainless steel unless otherwise noted.  
Specifications:
  • Buna-n = -40°F to 200°F
  • Viton = -15°F to 390°F
  • Pressure Unbalanced = 150psi
  • 5000 ft / min.
 Similar To:
  • Pac Seal Type 51
  • John Crane Type 1 &1A
  • Sealol Type 43 CE Long
 Applications:
  • Petrochemical Pumps
  • Petrochemical Compressors
  • Chemical Pumps
  • Waste Water Pumps
  • Marine Slurry Pumps
Industry Standard Number Shaft Size (Inch) Seal Size (Dia. Inch) Working L (Inch) Seat Bore (inch) Seat Thickness (Inch)  Diaphragm Material Washer Material  Seat Material
275 .750" 1.199" 1.312" 1.375" .406" Buna-n Carbon Ceramic
188 .875" 1.324" 1.375" 1.500" .406" Buna-n Carbon Ceramic
754 1.000" 1.499" 1.562" 1.625" .437" Buna-n Carbon Ceramic
204 1.125" 1.562" 1.625" 1.750" .437" Buna-n Carbon Ceramic
384 1.125" 1.562" 1.625" 1.750" .437" Buna-n Carbon Ni-resist
361 1.250" 1.687" 1.625" 1.875" .437" Buna-n Carbon Ceramic
354 1.375" 1.820" 1.687" 2.000" .437" Buna-n Carbon Ceramic
305 1.500" 1.949" 1.687" 2.125" .437" Buna-n Carbon Ceramic
745 1.625" 2.125" 2.000" 2.375" .500" Buna-n Carbon Ceramic
205 1.750" 2.300" 2.000" 2.500" .500" Buna-n Carbon Ceramic
523 1.875" 2.437" 2.125" 2.625" .500" Buna-n Carbon Ceramic
477 2.000" 2.562" 2.125" 2.750" .500" Buna-n Carbon Ni-resist
479 2.000" 2.562" 2.125" 2.125" .500" Buna-n Carbon Ceramic
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