Technical features:

· Unbalanced

· Single spring 

· Bi-directional

· Elastomer diaphragm

· Equivalent to John Crane Type 1A

Operating limits:

· P1= 1.6 MPa

· t= -40 to 205℃

· Vg= 30m/s

Materials:

· Seal faces: carbon graphite, silicon carbide, tungsten carbide

· Stationary seats: alumina dioxide, silicon carbide, tungsten carbide

· Bellows: NBR, EPDM, VITON

· Springs and other metal parts: AISI304,316 

· Secondary seals: NBR, EPDM, VITON

Dimension in inch：