Parallel Slide Gate Valve for Nuclear Power Plant.
	1.Function
	- Valve Isolation : The mechanism of Parallel Slide Gate Valve is far superior to the wedging
	action closure used in a wedge gate valve design. The line pressure alone
	causes a tight seal far superior to that of the wedging action.
	- System : Shutdown cooling System(SCS)
	Suction Line Isolation
	2.Characteristics
	- For bi-directional flow conditions, equalizing valve are recommended for water and steam.
	Valve is susceptible to pressure locking and thermal binding.
	- Used with high temperature steam or water in power and process applications.
	- Performed functional qualifiction test for valve assembly per ASEM QME-1
	- Performed equipment qualification for actuator per by IEEE 344, 382 and 323
	- Class 1 active and non-active service. The upset emergency or faulted conditions will be
	analyzed concurrently with 5g seismic load applied simultaneously alone three major axes.

 

 

	Globe Valve for Nuclear Power Plant.
	1.Function
	A Globe Valve employs a disc that open and closes by moving linearly along the seat axis. There
	many types of globe valve bodies, seats and methods of guiding the disc to and from the seat.
	2.Characteristics
	2.- Offered precise throttling and control
	2.- Offered a low coefficient of flow
	2.- Widely used to regulate fluid flow in both on/off and throttling service
	2.- Qualified by QME-1
	2.- Qualified actuator performance by IEEE 344

 

 

	Controlled Closure Check Valve .
	1.Function
	The Controlled Closure Check Valve was developed and qualified to serve a function to control the
	valve closing velocity.If a feed-water line should rupture in a nuclear power plant, the reversed
	flow from the  steam generator out of the containment boundary must be contained.
	Swing check valve would close rapidly, but not fast enough to prevent high reverse flow velocity;
	closure of the swing check valve would produce severe pressure surges due to water hammer -
	possibly severe pressure enough to produce rupture of other piping or equipment.
	The Controlled Closure Check Valve is similar to Y-pattern Lift check vavle, but it has an
	integral "dash-pot" - a battle plate with a close-clearance fit around the rod connecting the disc
	and piston. Flow paths sized for and consequently control the valve closing speed.
	2. Characteristics
	- Minimizes water hammer effects on postulated feed-water line break.
	- Computerized modeling verified by dynamic testing.

 

 

	Butterfly Valve for Nuclear Power Plant.
	1.Design characteristics
	- Valve Size : 2" through 48"
	- Valve Rating : Class 150
	- Application Code : ASEM B16.34 & ASME Sec. Ⅲ
	- Seismic Rating : Category Ⅰfor active and non-active service. The upset emergency or faulted
	conditions will be analyzed concurrently with 5g seismic load applied simultaneously along three
	major axes. The stress levels code allowable.
	- Qualification : Performed functional qualification test per ASME QME-1
	2.Seat Characteristics
	- Sealing is achieve by elastically deforming the seat.
	- Seat design offers the advantage of being easily replaceable in the field.
	- Mechanically retained on the disc ; adjustable with access from flanged end of the valve