D71F4-16PStainless steel wafer half lining butterfly valve uses the butterfly plate rotating with the valve stem as the opening and closing parts to realize the opening, closing and adjustment of the valve. In addition, the butterfly valve has the advantages of small volume, light weight and simple structure. Compared with the gate valve with the same parameters, the average weight is reduced by 30-50%. The opening and closing process can be realized by rotating the butterfly plate by 90 degrees. Moreover, the butterfly plates on both sides of the rotating shaft are subjected to approximately equal medium force and the torque is opposite, so the opening and closing torque is small.

Model: d71f4-16p caliber (DN): 50 ~ 1600 (mm) pressure (PN): 1.0 ~ 1.6 (MPA) product price: telephone date: 15-03-30 browse: 197 times

1. The center line butterfly valve is that the whole butterfly plate and valve seat are concentric in 360 ° circle (center line), with bidirectional sealing function, and the pressure and flow can be adjusted freely;
2. Four stage loading elastic seal ensures zero leakage inside and outside the valve;
3. Reasonable interference between the special transition curve at the joint of shaft head and butterfly plate and valve seat;
4. The end face of shaft head is composed of elastic O-ring, rigid washer and elastic rubber pad at shaft shoulder;
5. The radial direction of the shaft adopts the combination of O-ring and metal pad;
6. The valve seat is inlaid in the groove of the valve body with elastic strip;
7. Adjustable elastic bullet positioning. The positioning is accurate and the structure is simple.

D71F4-16PBasic model of stainless steel half Lined Butterfly Valve
Manual	DA71F/P Half lining	Worm gear transmission	DA371F/P Half lining
	DA71F3 Fully lined		DA371F3 Fully lined
	DA71F4 Fully lined		DA371F4 Fully lined
	DA71F46 Fully lined		DA371F46 Fully lined
Pneumatic	DA671F/P Half lining	Electric	DA971F/P Half lining
	DA671F3 Fully lined		DA971F3 Fully lined
	DA671F4 Fully lined		DA971F4 Fully lined
	DA671F46 Fully lined		DA971F46 Fully lined

 

D71F4-16PMaterial list of main parts and components of stainless steel half Lined Butterfly Valve
Serial number	Part name	Gray cast iron	cast steel	stainless steel		Ultra low carbon valve
		Z	C	P	R	PL	RL
1	Upper and lower valve bodies	HT250	WCB	CF8	CF8M	CF3	CF3M
2	Disc	WCB	35(Forging）	CF8	CF8M	CF3	CF3M
3	Disc shaft	1Cr13	2Cr13	1Cr18Ni9	1Cr18Ni12Mo2Ti	00Cr18Ni10	00Cr17Ni14Mo2
4	Liner / seat	PTFE(F4)、PCTFE(F3)、FEP(F46)、PFA(solubility4)
O-ring		FPM（Fluororubber）
6	Elastic strip (PAD)	Si（silicon rubber）
7	Adjusting positioning seat	0Cr18Ni9	0Cr18Ni9	1Cr18Ni9	1Cr18Ni12Mo2Ti	00Cr18Ni10	00Cr17Ni14Mo2
8	Bolt	35		1Cr17Ni2		1Cr18Ni9Ti
9	Nut	45		0Cr18Ni9		0Cr18Ni9
10	handwheel	Q235

Note: for the corrosion resistance of rubber lined valve, refer to the corrosion resistance table of various chemical media of rubber lined valve.

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