Type JCS1
Manufacturer: John Crane
Integrated Single Seal for Demanding Conditions
Safeseal JCS1 is a rugged, pump integrated single seal designed for clean and lubricating fluids such as water, oils, solvents and low consistency paper stocks. The JCS1 seal is easy to install from the impeller side. JCS1 is very advanced in its technical capabilities, including a patented drive mechanism for seal faces and self aligning, elastically mounted thrust ring.
The JCS1 is originally designed for Sulzer AHLSTARUP pumps and later expanded to cover Andritz process pumps and other equipment.
Several variants of the design available for different services:
CS1F Single application specific seal with flush into the medium
JCS1A Single application specific seal for Sulzer liquid ring pumps and Andritz ACP pumps
JCS1M Single application specific seal for Sulzer multistage pumps
JCS1G Single application specific grease seal
JCS1FM Single application specific seal with flush into the medium for Sulzer multistage pumps
• Single spring on atmospheric side located in the stationary part of the seal. Material is corrosion resistant. Shaft misalignment does not pulsate the spring or wear out the O ring.
• No measurements required for installation. Easy installation reduces risk of human error.
• Seal installation does not require back plate removal, and the seal is fastened with one bolt which guarantees fast, trouble free installation.
• Torque transmission with super elastic devices combined with no drive pins at seals faces. Seal faces do not crack at start up.
TEMPERATURE LIMITSJCS1 up to 194°F/90°C JCS1F up to 250°F/120°C
PRESSURE LIMITS225 psi(g)/16 bar(g)
SPEED LIMITS65fps/20m/s
STANDARD MATERIALSSeal faces: SiC/Carbon or SiC/SiC O rings: PTFE, EPDM, Viton Metal parts: EN 1.4436/1.4460 (AISI 316/329) Springs: EN 1.4436 (AISI 316)