Pneumatic metal seal butterfly valve

Pneumatic metal seal butterfly valve Product detail

Overview

This kind of product is assembled by three eccentric multi-layer metal hard-seal butterfly valve body parts and a small single-acting, double-acting pneumatic piston mechanism. The valve body parts adopt three eccentric sealing structure, which makes the valve tighter and tighter when opening and closing. Therefore, the sealing performance is effectively ensured. When opening, the valve plate is instantaneously separated from the sealing surface of the valve seat, and the friction torque is effectively reduced, so that the valve is opened and convenient and labor-saving. The actuator adopts high-quality aluminum alloy profiles, and the structure is novel, simple, stable, and reliable. It can be adjusted or cut off with electric valve positioner or solenoid valve. At the same time, this kind of product can also be used with electronic actuators. This kind of products are widely used in metallurgy, electric power, petrochemical and other industrial sectors to control various types. Gas, liquid medium.

The main technical parameters

Valve body
Type: straight through casting butterfly valve
Nominal diameter: DN80 ~ 900;
Nominal pressure: PN0.25, 0.6, 1.0, 1.6MPa
Connection type: wafer type flange connection convex surface
Main body and valve plate material: WCB (SCPH2) CF8 (304), CF8M (316)
Stem material: 2Cr13, 304, 316
Applicable temperature: normal temperature type -40 ~ 250 °C, medium temperature type -40 ~ 450 °C, high temperature type -40 ~ 700 °C
Filler: flexible graphite, asbestos braided packing
Remark: The valve plate sealing surface is surfacing with cobalt-based alloy multi-layer sealing surface, which is 316L and expansion surface ink sheet interlayer


In-valve assembly

Valve plate type: three eccentric butterfly plate
Sealing type: multi-layer composite seal, elastic seal
Leakage: DN80～500 relative to zero leakage, DN600 or above JB/T8527-9710×DNmm3/s
Adjustable ratio: 30:1

Executive agency

Type: AT-DA double acting piston actuator, AT-SR spring return actuator
Air source pressure: 0.4 ~ 0.6MPa
Air source interface: M10×1, M12×1.25
Output angle: 70° or 90°
Ambient temperature: -20 ~ +80 ° C
Accessories: solenoid valve, travel switch

Rated KV value

DN	80	100	125	150	200	250	300	350	400	450	500	600	700	800	900
Flow Coefficient	220	340	530	770	1360	2130	3060	4160	5450	6900	8500	12200	16600	21700	27100

 

Dimensions

DN	L		A		H1	H			Increased "H" size with handwheel mechanism
	clips	flange	QGH	AT		QGH		AT
80	49	114		290	82		260	240	120
100	64	127	560	295	95		300	285
125	70	140	560	295	120		375	360
150	70	140	560	308	150		480	450
200	71	152	630	308	215		590	560
250	76	165	630	474	265		660	610	125
300	83	178	630	474	295		810	750
350	92	190	870	592	325		970	910
400	102	216	870	664	365		1050	990	140
450	114	222	1100	664	400		1150	1050
500	127	229	1100	732	440		1210	1160
600	154	267	1100	732	505		1510	1390	160
700	165	292	1400	935	540		1570	1490
800	190	318	1400	935	600		1700	1650
900	203	330	1400	935	650		1850	1760