A21

 


A21
SINGLE SPRING, ELASTOMER BELLOWS SEAL

Features and Benefits:
• Cost effective seal common to many process pumps
• Bellows design helps compensate for face wear
• Bi-directional
• Multiple face and elastomer choices
• Equivalent to John Crane Type 21, Pac-Seal Type
21, US Seal C head

Standard Materials of Construction:
• Faces:
• Carbon Graphite (Resin Impregnated), Antimony-
Impregnated Carbon, Silicon Carbide, Tungsten
Carbide

• Elastomers:
• Buna, Viton®, Aflas®, Neoprene, EPDM

• Metallurgy:
• 304, 316, Monel

Operating Limits:

• Pressure: 150 psi 10.3 Bar
• Temperature: -40°F to +400°F.
All industry standard “PS” numbers are available,
All seat styles available
Just provide us the “PS” number required or one
used on previous orders

 
164 B Yankee Park Road • Fairfax, VT USA 05454
Toll Free: (888) 730-APEX • (888)730-2739 • (802)524-7100• Fax: (802) 524-7112
E-mail: Sales@apexsealing.com