China Stem Extension Butterfly Valve Suppliers, Manufacturers, Factory

Stem Extension Butterfly Valve

The elongated stem butterfly valve is also called the flap valve, which is a simple regulating valve and can also be used for on-off control of low-pressure pipeline media.

Structural features of the extended stem butterfly valve as follows:

1. The extension rod butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, rapid switching, 90° reciprocating rotation, and small driving torque. It is used to cut off, connect and adjust the pipeline Medium, has good fluid control characteristics and close sealing performance.

2. The extension rod butterfly valve can transport mud, and the liquid accumulation in the pipe mouth is the least. Under low pressure, good sealing can be achieved. Good adjustment performance.

3. The streamlined design of the butterfly plate makes the fluid resistance loss small, which can be described as an energy-saving product.

4. The valve stem is a through-rod structure, after quenching and tempering, it has good comprehensive mechanical properties, corrosion resistance and scratch resistance. When the extension rod butterfly valve is opened and closed, the valve stem only rotates and does not move up and down. The packing of the valve stem is not easy to be damaged and the sealing is reliable. It is fixed with the butterfly plate cone pin, and the extension end is designed to prevent the valve from breaking out to prevent the valve stem from collapsing when the connection between the valve stem and the butterfly plate is accidentally broken.

Product parameter of extension rod butterfly valve:

Size range: DN50-DN2000

Pressure range: 0.6-2.5MPa

Operate: Pneumatic with double-acting

Material: carbon steel, stainless steel

Applicable temperature: Carbon steel: -29℃ ~ 425℃ Stainless steel: -40℃ ~ 650℃

Applicable medium: Water, air, natural gas, oil

Driving method: Worm gear drive, electric, pneumatic, hydraulic

MOQ: 1set

Price: Negotiable

Delivery: Negotiable

Warranty: 12 month

Standard of pneumatic stem extension design butterfly valve

Part Name	Material
Body	WCB, alloy steel, stainless steel, QT450-10
Disc	WCB, alloy steel, stainless steel, QT450-10
Shaft	2Cr13 stainless steel, alloy steel
Seal ring	Stainless steel
Packing	flexible graphite

The dimension of stem extension type butterfly valve

Size(DN)	Main dimensions			Flange dimensions and bolt dimension
				1.0MPa			1.6MPa			2.5MPa
	L	H1	H	D	D1	n-Фd	D	D1	n-Фd	D	D1	n-Фd
50	108	350	112	165	125	4-18	165	125	4-18	165	125	4-18
65	112	370	115	185	145	4-18	185	145	4-18	185	145	8-18
80	114	380	120	200	160	4-18	200	160	8-18	200	160	8-18
100	127	420	138	220	180	8-18	220	180	8-18	235	190	8-22
125	140	460	164	250	210	8-18	250	210	8-22	270	220	8-26
150	140	555	175	285	240	8-22	285	240	8-22	300	250	8-26
200	152	760	200	340	295	8-22	340	295	12-22	360	310	12-26
250	165	830	243	395	350	12-22	405	355	12-26	425	370	12-30
300	178	895	250	445	400	12-22	460	410	12-28	485	430	16-30
350	190	950	280	505	460	16-22	520	470	16-26	555	490	16-33
400	216	1190	305	565	515	16-26	580	525	16-30	620	550	16-36
450	222	1255	350	615	565	20-26	640	585	20-30	670	600	20-36
500	229	1305	380	670	620	20-26	715	650	20-33	730	660	20-36
600	267	1340	445	780	725	20-30	840	770	20-36	845	770	20-39
700	292	1520	480	895	840	24-30	910	840	24-36	960	875	24-42
800	318	1710	530	1015	950	24-33	1025	950	24-39	1085	990	24-48
900	330	1810	580	1115	1050	28-33	1125	1050	28-39	1185	1090	28-48
1000	410	1960	650	1230	1160	28-36	1255	1170	28-42	1320	1210	28-56
1200	470	2250	760	1455	1380	32-39	1485	1390	32-48	1530	1420	32-56
1400	530	2435	850	1675	1590	36-42	1685	1590	36-48	1755	1640	36-62
1600	600	2780	1030	1915	1820	40-48	1930	1820	40-56	1975	1860	40-62
1800	670	3020	1230	2115	2020	44-48	2130	2020	44-56	2195	2070	44-70
2000	760	3270	1350	2325	2230	48-48	2345	2230	48-62	2425	2300	48-70