GENERAL INFORMATION

INSTRUCTION & FEATURES

It take within 3 minutes for one operator to blank a line, operating the handwheel and rotating the blind into place, without line spreading. Again, all inline movement is internal, eliminating the potential for pipe-joint stress. As one of the most popular model, quick operation with no line spread and correct spectacle positioner shall make easy and safe pipe line isolation.

TECHNICAL SPECIFICATIONS

NOMINAL DIAMETER

NPS 1/2 (DN15) - NPS100 (DN2500)

TEMPERATURE RANGE

Standard Design : -20℃ ~ +200℃
High Temp. Design : +200℃ ~ +816℃
Cryogenic Design : -196℃

PRESSURE RATING

ASME Class 150 to Class 1500
Other presure classes up to ASME 2500
# available upon request

MATERIALS

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

FUNCTION

Gas & Liquid Perfect Isolation( Zero Leakage )

OPERATION METHOD

Manual Operation
Electric, Pneumatic or Hydraulic Operation

Part & Description

Operating Instruction

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

APPLICATIONS