大型橡膠夾布油封-James walker Lofilm HD heavy-duty seal

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).