Z43H Flat-plate Gate Valve

Description:
It is a sliding valve. The closing member of this valve is a parallel flashboard. Its closing member can be a single plate or double plates with opening parts.
The clamping force of flat-plate gate valve with single plate is controlled by medium pressure. This medium pressure is from the floating plate or floating seat. However, the clamping force of the valve with double flat plates is from the opening parts in the middle of two plates.
Features:
1. This sealing shape of this flat-plate gate valve seat is o-shape. It adopts the pre-tightening force from the floating valve seat. Therefore, this valve has double sealing during the import and export of medium. And the opening and closing moment of this structure is only 12 of the common valve. So this valve can be opened and closed easily.
2. In the fully open, the channel of this flat-plate gate valve is smooth and straight. The flow resistance is extremely small. There is no pressure loss. The wool ball can pass though to clean the pipeline of the valve. 
3. This valve doesn't need to adjust often due to the adoption of self-sealing packing materials. The opening and closing of this flat-plate gate valve is very convenient. The assisting sealing grease is injected in stuffing box. It can ensure zero leakage. Therefore, the sealing is absolutely reliable. It solves the leak in packing place of the common valve.
4. When it is closed, flat-plate gate valve can unload the high pressure inside automatically. This can ensure the safety of operation.
5. This valve adopts fully-closed structure; the protective performance is well
So it can be used in the whole day.

Technical Specification

Design reference		API
Design standard		API 6D ASME B16.34
Structural Length	Flanged	API 6D ASME B16.10
	Welded connection
Flanged ends		ASME B16.5 MSS SP44
Butt-welding ends		ASME B16.25
Test and inspection		API 6D API 598

Major Parts Material Form

NO.	Accessory name	Material
		Ordinary type	Anti Sulphur type
		ASTM	ASTM
1	Blowdown stops	A105+Zn	A276-304
2	Grease injection joint	A105+Zn	A105+Zn
3	Body		A216-WCB
4	Disc	A105+ENP	A276-304
5	Seat	A105+ PTFE	A276-304+PTFE
6	O-ring	NBR	FPM
7	Stem	A276-420	A276-304
8	Packing	A276-420	A276-420
9	“Y” ring	NBR	FPM
10	Sealing shroud	A276-420	A276-420
11	Indicating stem	A276-304	A276-304
12	Gasket	graphite+304	graphite+304
13	Bonnet	A216-WCB	A216-WCB
14	Stud	A193-B7	A193-B7
15	Nut	A194-2H	A194-2H
16	Yoke	A216-WCB	A216-WCB
17	Stem nut	C95500	C95500
18	Gland	A105	A105
19	Hand wheel	A536-64-40-18	A536-64-40-18
20	Indicating cover	A276-304	A276-304

Main Size of Outside

Note: The major parts of the valves can be designed and selected according to actual work condition or customers' specific requirement.

Statement: this information is just for reference, for detailed information, please contact us.