DESCRIPTION
The PSC double-acting crown seal is a squeeze-type seal utilizing an o-ring as a loading spring to seal the static surface. The crowned sealing surface produces positive seal from vacuum to high pressure due to narrow single line seal contact area. The side legs act as an anti-extrusion device for the o-ring as well as add stability to the seal. Being bi-directional, PSC seals are also used in slow speed rotary services.
The shell is molded in polyurethane, ensuring flexibility for installation and performance at high/low pressures.
The PSC crown seal is directly interchangeable with corresponding T-seal, standard O-ring, O-ring w/Back-up (1 back-up – Intermediate Base; 2 back-ups – Wide Base), and PSM seal grooves.
| A Nom ID | 2-5/8 |
| B Nom OD | 3 |
| C Nom Height | .255 |
| D Groove Width | .280 |
| O Ring Dash Number | -334 |
| H Groove Diameter | 2.625 |
| I Piston Diameter | 2.997 |
| J Bore Diameter | 3.000 |
SEAL INFORMATION
Material Type (Primary Seal): POLYURETHANE
Material Type (Energizer): 70A NITRILE
Durometer (Shore A): 95
Temperature Range (F): -40 TO 248
Extrusion Gap at Various Pressures (in):
- 4,500 PSI: 0.008
- 5,000 PSI: 0.006
Max Speed (ft/sec): 3.0
Mating Surface Roughness - Ra (µin) - DYNAMIC: 4<>16
Mating Surface Roughness - Ra (µin) - STATIC: 63 MAX
