Classification

Welded metal hard seal butterfly valve

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Classification:

Cast steel valve series

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Description

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆ Product overview

Welded metal hard seal butterfly valve with three eccentric structure, the valve design in high temperature, high pressure, fire applications is the ideal bubble level seal butterfly valve. Due to the use of welded structure, so the valve and pipeline plane to achieve permanent zero leakage, the welding butterfly valve without flange, the pipeline insulation package has brought great convenience.

◆ Product use

Welded metal hard seal butterfly valve is widely used in heat, petroleum, chemical, electric power, metallurgy, food, medicine, textile, paper and other industries, can be installed in the temperature ≤ 425 ℃, medium for gas, air, steam, water, sea water, oil and other industrial pipe network for regulating flow and cut off the medium.

◆Product features

1, compact structure, small size, light weight, flexible operation, easy to use;
2, the use of three-dimensional eccentric multi-level hard seal structure, its sealing performance is reliable to achieve zero leakage;
3. This valve has no flange, which brings great convenience and beauty to the insulation wrapping of the pipeline;
4. It has the characteristics of high temperature resistance, high pressure, corrosion resistance and wear resistance.

◆ Executive standards

design and manufacture	WELDING DIMENSIONS	Structure length	TEST AND INSPECTION
GB/T12238 JB/T8527	GB/T12224	GB/T12221	GB/T13927、GB/T26480

◆Main technical parameters

Nominal diameter	DN(mm)	50~700
Nominal pressure	PN(MPa)	0.6	1.0	1.6	2.5	4.0
Test pressure (MPa)	Strength test	0.9	1.5	2.4	3.75	6.0
	Sealing test	0.66	1.1	1.76	2.75	4.4
	Gas seal test	0.6	0.6	0.6	0.6	0.6
Applicable media	Water, steam, oil, acid corrosion, etc.
Applicable temperature	Carbon steel: -29 ℃ ~ 425 ℃ Stainless steel: -40 ℃ ~ 600 ℃

◆ Material of main parts

Part Name	Materials
Valve body	Cast steel, chromium molybdenum steel, alloy steel, dual phase steel
Butterfly plate	Cast steel, chromium molybdenum steel, alloy steel, dual phase steel
Valve seat	Stainless steel, hardfacing stellite and other hard alloys
Sealing ring	Stainless steel and high temperature resistant asbestos board combined into multi-level
Stem	20Cr13, 1Cr13 stainless steel, chromium molybdenum steel, special materials
Shaft sleeve	Austenitic stainless steel, 304 nitriding
Packing	Flexible graphite, PTFE
Packing gland	Cast steel, stainless steel
Bracket	Cast steel, stainless steel

◆ Main outline connection dimension

Nominal pressure PN0.6MPa									Nominal pressure PN1.0MPa
DN	Overall dimension							WT (Kg)	Overall dimension							WT (Kg)
mm	L	D	d	H	H₁	A	B	WT (Kg)	L	D	d	H	H₁	A	B	WT (Kg)
600	390	636	602	499	1280	570	660	450	390	636	602	499	1280	570	660	465
700	430	726	692	566	1480	750	550	660	430	726	692	566	1480	750	550	680
800	470	826	792	632	1608	750	550	780	470	826	792	632	1608	750	550	810
900	510	926	892	693	1857	750	550	820	510	926	892	693	1857	750	550	860
1000	550	1028	992	757	2038	900	750	1460	550	1028	992	757	2038	900	750	1625
1200	630	1228	1192	851	2237	1000	925	1590	630	1228	1192	851	2237	1000	925	1770
1400	710	1428	1392	876	2411	1000	925	2185	710	1428	1392	876	2411	1000	925	2425
1600	790	1628	1592	1095	2756	1000	925	3210	790	1628	1592	1095	2756	1000	925	3560
1800	870	1828	1792	1214	3093	1100	980	4090	870	1828	1792	1214	3093	1100	980	4545
2000	950	2028	1992	1332	3355	1100	980	5610	950	2028	1992	1332	3355	1100	980	6230

◆ Main outline connection dimension

Nominal pressure PN1.6MPa									Nominal pressure PN1.6MPa
DN	Overall dimension							WT (Kg)	DN	Overall dimension							WT (Kg)
mm	L	D	d	H	H₁	A	B	WT (Kg)	mm	L	D	d	H	H₁	A.	B	WT (Kg)
80	46	90	78	90	356	180	200	27	600	390	636	602	509	1369	570	660	457
100	52	110	96	100	375	180	200	34	700	430	726	692	572	1492	750	550	810
125	56	135	121	113	401	180	200	41	800	470	826	792	638	1622	750	550	1093
150	56	161	146	130	450	270	280	43	900	510	926	892	700	1924	750	550	1410
200	60	222	202	205	545	400	425	81	1000	550	1028	992	765	2054	900	750	1870
250	68	278	254	235	630	400	425	102	1200	630	1228	1192	860	2259	1000	925	2082
300	78	330	303	275	715	450	560	132	1400	710	1428	1392	986	2610	1000	925	2850
350	78	382	351	309	817	450	560	164	1600	790	1628	1592	1106	2856	1000	925	4235
400	102	432	398	346	923	535	580	193	1800	870	1828	1792	1226	3121	1100	980	5346
450	114	484	450	392	1059	535	580	238	2000	950	2028	1992	1345	3385	1100	980	7328
500	127	535	501	427	1126	535	580	302	-	-	-	-	-	-	-	-	-

Note: The structure length in this table is in accordance with GB/T 12221.