GENERAL INFORMATION

INSTRUCTION & FEATURES

The traditional style of line blind offers a broad range of pressures and a lower cost. The basic standard for line blinding for many years. After turning 3~7 jack bolts around the body to make a gap by round bar or wrench and then change the blind plate position. Pipe line needs to be spreaded for operation.

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