ZSHWE/ZDRWE series triple eccentric butterfly valve-Fornitore globale

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Details Explanation

ZSHWE/ZDRWE series triple eccentric butterfly valveThe valve plate and sealing ring adopt a unique three eccentric structure, which has the characteristics of compact structure, good cutting performance, and long service life, and has both regulating and cutting functions. Widely used in industries such as chemical, power, textile, food, medicine, papermaking, as well as municipal engineering, water plants and other pipelines to cut off or regulate flow control of tap water, sewage, oil liquids or media such as air, coal gas, natural gas, and water vapor.

The nominal pressure rating of this series of products includes PN (MPa) 0.6, 1.0, 1.6, 4.0 (150lb, 300lb); Valve body diameter range DN80-1200 (3 "-48"); Applicable fluid temperature range -60 to+450 ℃; Multi level sealing, achieving zero leakage in both directions; When fully metal hard sealed, it can cause V-level leakage. The traffic characteristics are approximately equal percentages.

FEATURES

The valve body adopts integral casting technology, with a compact structure, small volume, and light weight;
Three eccentric installation of valve plate. When closed, the valve plate expands outward to achieve the best peripheral sealing effect; When opened, the valve plate and sealing ring quickly detach, effectively reducing the wear of the sealing ring;
The sealing ring design is innovative, concise, and maintenance free;
- The sealing ring is in the form of a multi-level metal hard seal, suitable for various harsh working conditions;
Due to the use of a three eccentric structure, the operating torque is greatly reduced;
Low flow resistance, high rated flow coefficient, about three times that of a single seat valve of the same caliber;
Strong self-cleaning ability and long service life;
The valve adopts a flange structure;
The standard actuators (pneumatic piston and electric) are interchangeable.

Structural diagram

Table 1

Serial Number	Part name	Common materials
1	Valve seat	304, 316+Stellite alloy
2	Multi level composite sealing ring	304+graphite, 304+PTFE
2	All metal sealing ring	304, 316+Stellite alloy
3	Bottom cover	ZG2Cr13
4	Valve body	WCB、CF8、CF8M
5	Pressure plate	WCB、CF8、CF8M
6	Pressing ring	WCB、CF8、CF8M
7	Valve plate	WCB、CF8、CF8M
8	Valve stem	2Cr3, 17-4PH
9	BEARING	QAL9-4

Basic structure and sealing ring form

C.Eccentricity principle

1. Valve body 2, valve stem 3, valve plate 4, valve seat

5. Pressure plate 6, sealing ring 7, sealing ring pressure plate

Multi level compositesealing ringAnd all metal sealing ring

1. Pressure plate 2, valve seat 3, sealing ring pressure plate 4, valve body

5. Valve plate 6, multi-layer composite sealing ring 7, all metal sealing ring

There are three eccentricities in the design of eccentric butterfly valves: the rotation axis of the valve plate deviates from the center of the cross-section of the valve plate sealing surface (H)₁）； The rotation axis deviates from the center of the valve body passage (H₂）. The axis of rotation of the valve seat forms an angle a with the axis of the valve body passage. Thus, three eccentricities are formed.

When opened, all points on the sealing surface of the valve plate simultaneously detach from the sealing ring, and there is no compression between the valve plate rotation and the sealing ring, which improves the service life of the sealing ring. Maintain an automatically adjustable optimal sealing effect on the sealing surface. Adopting multi-level composite sealing rings, with a leakage level of VI and zero leakage; Adopting all metal sealing rings, with a leakage level of V.

Main performance indicators

Serial Number	project		Pneumatic triple eccentric butterfly valve	Electric triple eccentric butterfly valve
1	Basic error<(%)		±2.5	±2.5
2	Return difference<(%)		2.5	2.0
3	Dead zone<(%)		2.0	3.0
4	Constant point deviation<(%)	Starting point	±2.0	±1.5
		End
5	Rated angle deviation ＜ (%)		+2.5	+0.5
6	Deviation of rated flow coefficient ＜ (%)		+10

Note: The performance indicators of this product comply with GB/T4213-2008.

Specifications and technical parameters

1. Rated flow coefficient

Nominal diameter DN (mm)		80	100	125	150	200	250	300	350	400
Rated flow coefficient Kv		150	365	445	950	1880	3150	4550	6200	8100
Pneumatic piston type	Single action	100	100	125	143	160	190	210	240	270
	Torque (Nm)	50	50	100	200	300	400	600	1000	1600
	Double action	83	83	100	125	143	160	190	210	240
	Torque (Nm)	50	50	100	200	300	400	600	1000	1900

Nominal diameter DN (mm)		450	500	600	700	800	900	1000	1200
Rated flow coefficient Kv		10260	13500	19800	27000	35700	44600	55080	81000
Pneumatic piston type	Single action	370	300	300	350	400	HAW35S	HAW40S	HAW50S
	Torque (Nm)	1600	2000	2000	2500	3500	5500	8100	14800
	Double action	240	240	240	270	300	350	400	HAW35
	Torque (Nm)	1900	1900	1900	2600	3500	5700	8500	16000

2. Main technical parameters

Nominal diameter DN (mm)	DN80～1200（3”～48”）
Nominal pressure PN (MPa)	0.6, 1.0, 1.6, 4.0 (150lb, 300lb)
Inherent flow characteristics	Approximately equal percentage
Inherent adjustable ratio R	50
Rated angle (°)	80
Pneumatic actuator form	Single acting, double acting
Gas source pressure (MPa)	The recommended air source pressure for the actuator is 0.5MPa
supply voltage	220V. AC 50Hz 380V AC 50Hz (three-phase)
Input signal	4～20mA. DC, 0-10mA. DC, 1-5V. DC or above signal split range control
Connection form	Flange type: Flange standard HG/T20592-2009 Clamp type: API609
Working temperature (℃)	Carbon steel: -20~425 ℃, stainless steel:- 40～595℃

Note: 1. Special requirements can be produced according to customer specifications;

2. Flanges can be manufactured according to flange standards such as ANSI and JIS.

Temperature and pressure range for the use of valve body and valve cover materials

pressure temperature	PN16		PN40		PN64
pressure temperature	WCB	CF8	WCB	CF8	WCB	CF8
-196～-20	—	16.0	—	40.0	—	64.0
-20～100	16.0	16.0	40.0	40.0	64.0	64.0
150	16.0	16.0	40.0	40.0	64.0	64.0
200	16.0	16.0	40.0	40.0	64.0	64.0
250	14.0	15.0	36.0	38.0	56.0	60.0
300	12.5	14.0	32.0	36.0	50.0	56.0
350	11.0	13.2	28.0	34.0	45.0	53.0
400	10.0	12.5	25.0	32.0	40.0	50.0
425	9.0	12.0	22.0	30.7	36.0	48.4
450	6.7	11.5	17.0	29.5	26.5	46.8
500	—	10.5	—	26.5	—	42.5
525	—	9.9	—	24.6	—	39.2
560	—	9.0	—	22.0	—	36.0

Operating temperature range and valve seat leakage of the whole machine

Valve body	WCB、CF8、CF8M
Valve seat	304, 316, 316+Si Ti Lai alloy
sealing ring	Multi layer composite sealing ring, stainless steel+Si Ti Lai alloy
Pressing ring	WCB、CF8
Packing material	Polytetrafluoroethylene, flexible graphite
shim	Graphite wrapped gasket, PTFE gasket
Leakage level	Multi level sealing ring: Grade VI, zero leakage
Leakage level	All metal sealing ring: Grade V
Valve seat leakage （L/h）	Multi level sealing ring: microbubble level
Valve seat leakage （L/h）	All metal sealing ring: 1.8 × 10^-7×△P×D
Temperature range (℃)	-20-200- 40~450

Equipped with pneumatic piston actuator (single acting), allowable differential pressure gauge unit: MPa

actuator	83	100	125	143	160	190	210	240	270	300	350	400	HAW35S	HAW40S	HAW50S
Torque (Nm) DN(mm)	40	80	125	230	320	550	677	1000	1612	1929	2700	3600	6100	8700	14000
80	0.4	0.8
100		0.3	1.0
125			0.4	1.0
150				0.3	1.2
200					0.2	0.8	1.6
250						0.3	0.6	2.0
300						0.2	0.6	1.6
350							0.2	0.6	1.2
400							0.1	0.6	1.0	1.6
450								0.2	0.6	1.6
500									0.5	1.0	2.0
600									0.3	0.6	1.6
700										0.5	1.2
800											0.6	1.4
900											0.2	0.8	1.2
1000												0.2	0.6	1.2
1200														0.3	0.8

Note: 1) The gas source pressure is calculated at 0.5MPa;

2) The allowable pressure difference in the table is the standard configuration value of our company, and a larger torque actuator can be selected according to the user's operating conditions.

Equipped with pneumatic piston actuator (double acting), allowable differential pressure gauge unit: MPa

actuator	75	83	100	125	143	160	190	210	240	270	300	350	400	HAW35
Torque (Nm) DN(mm)	50	70	113	275	433	550	900	1185	1787	2700	3500	5200	8100	16000
80	0.4	0.8
100		0.3	1.0
125			0.4	1.0
150				0.3	1.2
200					0.2	0.8	1.6
250						0.3	1.0	2.0
300						0.2	1.0	1.6
350							0.2	1.0	1.2
400							0.3	1.0	1.6
450								0.2	0.8	1.6
500								0.5	1.0	2.0
600									0.3	1.2	2.0
700										0.6	1.2
800										0.4	0.8	1.6
900										0.2	0.4	0.8
1000											0.2	0.6	1.2
1200													0.4	1.2

Note: 1) The gas source pressure is calculated at 0.5MPa;

2) The allowable pressure difference in the table is the standard configuration value of our company, and a larger torque actuator can be selected according to the user's operating conditions.

Allowable differential pressure gauge for electric actuator unit: MPa

actuator	01	02	03	04	05	06	07	08	09	10	11	12
Torque (Nm) DN(mm)	50	100	200	300	600	900	1200	2000	3000	5000	8000	15000
80	0.4	0.8
100		0.3	1.0
125			0.4	1.0
150				0.3	1.2
200				0.2	0.8	1.6
250					0.6	1.2	2.0
300					0.4	1.0	1.6
350						0.6	1.2	2.0
400						0.4	1.0	1.6
450							0.2	0.8	1.6
500							0.5	1.2	2.0
600								0.8	1.2	2.0
700								0.4	0.6	1.6
800									0.4	0.8	1.6
900									0.2	0.6	1.2
1000									0.2	0.5	1.0
1200											0.4	1.2

Note: 1) The allowable pressure difference in the table is the standard configuration value of our company, and a larger torque actuator can be selected according to the user's operating conditions.

Three eccentric butterfly valve selection sample download