大型橡膠夾布油封-James walker Lofilm HD heavy-duty seal
Lofilm HD
Heavy-duty forging & extrusion presses
Description
This pressure responsive seal is designed for arduous reciprocating gland applications — where fast pressure rises occur and side loads can be substantial. In heavy-duty
horizontal applications, our Lofilm HD operates as a highly efficient seal and also accommodates lateral or side loads.
Special features
• Robust high-integrity seal, well proven on heavy-duty ram applications.
• Pressure responsive primary sealing ring provides instant sealing action,
even at low pressure.
• Improved sealing integrity on worn shafts to extend ram operating life.
• Available in split form for major downtime savings.
• Available with Self-aligning Gland Ring (see page 39).
Typical applications
Arduous duties with rams on forging and extrusion presses, including heavy-duty
horizontal applications. Also, equipment with rapid advance mechanisms, where
Lofilm HD can prevent air being drawn into the system: this avoids uncontrollable
movement of the main ram and possible severe damage to the seal and other
components by cavitation.
Operating capabilities
• Maximum operating pressure: 62MPa (8992psi).
• Temperature range (standard materials): -20°C to +120°C (-4°F to +248°F).
• Maximum surface speed: 0.5m/s (98.4fpm). For higher speeds please consult our Technical Support Team.
Materials of construction
Gland ring/female adapter
Standard material: heavy duty cotton fabric proofed with medium nitrile (NBR)
rubber.
Special materials: heavy duty synthetic fabric proofed with hydrogenated nitrile
(HNBR), butyl (IIR), or fluorocarbon (FKM).
Intermediate ring
Standard & Special materials: as for gland ring.
Header ring
Standard material: nitrile (NBR) rubber. Special materials: hydrogenated nitrile
(HNBR), butyl (IIR), or fluorocarbon (FKM).
