Line Blind

Line blinding has been used to pipelines in various industries wherever either positive shutoff is most concerned or full flow should be achieved without pressure drop.

The usual practice for line blinding by using typical materials such as spectacle blinds, spool piece, blind flange valves etc. with gaskets inserted between flanges has however been labour intensive & time consuming and thus resulted in making expense factors which include the time required for the blinding/blanking process, loss of productivity caused by long blinding time and also the operators of the production line have been unavoidably exposed to the potential hazard of explosion, fire, pollution and in halation.

The Line Blind Valves incorporating a touch and simple design has been developed to provide absolute shut-off, quick opertion and trouble-free service with minimal maintenance.

The unique and simple opening-closing mechanism of Line Blind Valve allows one person to blank or blind heavy pipe work with ease, rapidity and safety without any tools or hoisting apparatus etc.

Why choose Line blind valves ?

    Quick blind valves have the successful   combination of two essential criteria-
   zero leakage to the downstream and safe
   and easy blinding with untrained person.

    And our products are manufactured under the
  strict quality control system

Absolute shut off
In the closed status, any liquid or gas cannot leak to the downstream
Quick change
Heavy pipe line can be blinded safely within 30 sec. ~ 2 min.
Only one operator
Untrained one person can operate with ease and safe upto 24" pipe line.
Non line spread
The operating principal of Line Blinds eliminate the need to spread pipe, valve or flange.
Cost saving
Not only saving man-hours, but increasing the production time
No tools
Turns hand wheel, then swing or sliding the blind plate without tools and cranes.
Safety working
Blinding with the is not labor intensive and no more jeopardizes safety with few people around the pipe work
Simple structure
Simple and solid structure needs minimal maintenance only for sealing gasket replacement.

Cost effectiveness

Necessary time for blinding or deblinding

Size Ranged	Blinding Technique		Saving Effect
Size Ranged	Solid Plate between flanges(typical)	Line Blind	Saving Effect
1/2"~12" (DN15 ~DN300)			- 2~16 man-hours - Gasket, bolts & nuts, tools - Time for draining and line cooling
14"~24" (DN350~DN600)			- 16~120 man-hours - Gasket, bolts & nuts, tools - Time for draining and line cooling

Increase productivity

Size	Blinding(typical)	Deblinding(typical)	More production
1/2" ~ 6"	1 to 4 hours	1 to 4 hours	2 to 8 hours
8" ~ 24"	4 to 12 hours	4 to 12 hours	8 to 24 hours

             - time saving for draining and line cooling is not included
             - less pre-purge time
             - immediate work after stopping line

Saving cost for maintenance
- long life and simple design criteria
- no consumable parts except gaskets- it shall be replaced in case of broken after visual checking
- no tools, wedges, crane, bolts are neccery

Positive shutoff
- quick and positive response in emergency
- prevent vacuum losing
- prevent contamination by mixing
- prevent leaking accident in service
- prevent environmental pollution

Products

	Swing type	A heavy pipe line can be blinded by operating the hand wheel with safe and ease. It takes 10 second ~2minutes by one person without line spreading. One turns the hand wheel and then swing the spectacle blind to secure the blind by hand wheel.
	Sliding type	A pipe line is blinded by a blind plate sliding straight forward and backward. It allows one person to blind a heavy pipe line within 2 minutes by operating the hand wheel
	Compact type	This type is proper to a large size of pipe line. it has solid structure and very short face to face dimension. It allows one person to blind a heavy pipe line within 2 minutes by operating the hand wheel without line spreading. One turns the hand wheel and then slide the blind plate to secured it by hand wheel.
	Non-spill type	The body of a line blind are covered to prevent from hazard or pollution during open/ close procedure. it has very short face to face dimension and compact design. One turns the hand wheel and then lift up and turn around the blind plate to set in position to secure the blind plate by hand wheel.
	Econ-swing type	After a couple of turning of the 3~5 jack bolt around body to move back a pipe line by use of round bar to secure the blind plate in position. It has basical structure and lower cost than handle operating types but widely applicable to extreme pressure & temperature service.

Product Range

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