QLL Series

• long leg 1/4 turn manual
• pressure rating: 3500 psig
• flow coefficient: cv =.13
• seat orifice size: .125 diameter
• standard seat material: pctfe
• temperature limits: -65f to 150f
• max allowable seat leakage: 2 x 10-5 atm cc/sec he
• max inboard leakage: 2 x 10-5 atm cc/sec he
• wetted diaphragm: 316l sst
• optional bottom mount: 2 x #10-32 tapped holes on a 1” bolt circle
• optional panel mount: panel hole size: 57/64”

• bar stock construction
• springless design
• metal diaphragm sealed
• positive shut-off
• quick acting open to close
• low internal volume
• high cycle life
• ultrasonically di cleaned
• 100% helium leak tested

• bottom mount or panel mount options available on request
• electropolished id surface available on request
• custom materials and configurations available on request

Seat Material:

• PCTFE
• polyimide

End Connections:

• 1/4 male and 1/4 female pipe thread
• 1/4 compression
• 1/4 and 3/8 tube socket weld
• 1/4 pipe socket weld
• 1/4 face seal
• 1/4 and 3/8 orbital tube weld
• custom connections

• brass
• nickel plated brass
• stainless steel
• monel
• aluminum silcon bronze