Jack Bolt type line blind has been used for a long time as it is applicable for a broad range of pressure pipelines with a lower cost. To change the blind plate position, an operator is required to unbolt it manually.
NPS 1/2 (DN15) – NPS100 (DN2500)
Standard Design : -20℃ ~ +200℃
High Temp. Design : +200℃ ~ +816℃
Cryogenic Design : -196℃
ASME Class 150 to Class 1500
Other presure classes up to ASME 2500
# available upon request
BODY : Carbon Steel, Stainless Steel, Special Material (Duplex, Hastelloy, Monel, Inconel etc.)
BLIND : Stainless Steel, Special Material (Duplex, Hastelloy, Monel, Inconel etc.)
MOVING PARTS & SEALING SURFACE are Anti-corrosion Materials
Gas & Liquid Perfect Isolation( Zero Leakage )
Manual Operation Electric, Pneumatic or Hydraulic Operation
1) Before turning the handwheel to change the blind plate position, internal pressure of the valve must be drained and be sure no pressure(Zero).
2) Unlock locking device for turn to handwheel
3) To change the blind plate position, turn the handwheel clockwise until indicator reaches to “Open” mark.
4) When indicator is on “open” mark, change the blind plate position to open or close.
5) After change the blind plate position, turn the handwheel counter-clockwise until indicator reaches to “Close” mark to tighten the seat.
6) Lock locking device for can’t use ahourized person