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DZWT series integrated regulating valve electric device

key word：Heat exchange element

Category:

Valves and actuators

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Product description

DZWT series integrated regulating valve electric device

1. Introduction

1.1. Purpose

DZWT series integrated regulating valve electric device is a device that controls the final control element (valve) in the closed-loop control system. It is suitable for multi turn regulating valves. Its derivative products can be applied to partial rotation (angular stroke) and straight stroke regulating valves. It can accurately adjust the pressure, temperature and flow of the medium under system working conditions according to the control instructions, It is widely used in power station, petrochemical, metallurgy, public utilities, etc.

1.2. Model meaning

DZWT-**-##

DZWT -- Code of regulating electric device

** -------- output rated torque (× 10N · m)

## -------- Z represents straight stroke; t represents thrust type; I represents power station type

1.3. Structural features

1.3.1. Structure description: DZWT series integrated regulating valve electric device is mainly composed of stroke control mechanism, torque control mechanism, opening mechanism, hand wheel component, motor, reducer, electrical control part, etc. The electrical control part of the integrated adjustable electric actuator also includes power module, drive module, power control board (CPU), touch button control panel, solid state relay, etc., as shown in figure 69-1. Electric device is driven by the motor reduction gear, through the worm gear rod to reduce the speed to the rated output shaft speed, in order to drive the valve stem.

DZWT series integrated regulating valve electric device adopts special regulating motor. All detection, diagnosis and control functions of the control part are realized by the internal program software of CPU on the main control board. After A / D conversion, the regulation signal (4 ~ 20mA) sent by the external regulator or DCS system is compared with the actual signal of the sensor of the electric device to generate the driving signal, so as to accurately carry out automatic regulation (see figure 69-2).

1.3.2. Important characteristics:

1.3.2.1. The structure is reasonable and versatile, which can meet the needs of various supporting functions.

1.3.2.2. The control mechanism has the advantages of constant action, convenient adjustment and high precision.

1.3.2.3. The motor has large starting torque and small moment of inertia.

1.3.2.4. The valve opening can be adjusted freely

1.3.2.5. It has the function of open phase protection and automatic identification of phase sequence

1.3.2.6. Arbitrary switching between near control and remote control.

1.3.2.7. Light indicates operation status.

1.3.2.8. It has various fault diagnosis and alarm functions.

2. Main technical parameters and product appearance

2.1. Main technical parameters

2.1.1. Typical technical parameters.

Power supply: 380V, 50Hz, three-phase three wire system;

Ambient temperature: - 20 ~ 60 ℃;

Relative humidity: no more than 90% (25 ℃);

Working environment: no corrosive, flammable and explosive medium;

Protection grade: IP65;

Working mode: S4 or S5 periodic intermittent working mode, the maximum allowable working times is 1200 times / h, and the minimum load duration rate is 10%;

Valve position feedback signal: 4 ~ 20mA

2.1.2. Main technical parameters (see table 69-1)

Table 69-1 main technical parameters of DWT series integrated regulating valve electric device

Model	Nominal torque	Min. control torque	Output revolutions	Allowed through stem diameter	Manual ratio	Output speed	Motor power	Rated current
	(N·m)	(N·m)	(r)	(mm)	i	(r/min)	(kW)	(A)
DZWT10, DZWT10 (Ⅰ)	100	≤50	50	28	1︰1	24	0.25	1.3
				24		36	0.37	1.6
DZWT15, DZWT15 (Ⅰ)	150	≤75	50	28	1︰1	24	0.37	1.6
				24		36	0.55	2.4
DZWT20, DZWT20 (Ⅰ)	200	≤100	50	40	l︰1	24	0.55	2.4
				28		36	0.75	3
DZWT30, DZWT30 (Ⅰ)	300	≤150	50	40	1︰1	21	0.75	3
				28
DZWT45	450	≤225	120	48	1︰1	24	1.1	3.4
						36	1.5	4.5
DZWT60	600	≤300	120	48	1︰1	24	1.5	4.5
						36	2.2	6.5
DZWT90, DZWT90 (Ⅰ)	900	≤450	120	60	1:01	24	2.2	6.5
				48		36	3	9
DZWT120, DZWT120 (Ⅰ)	1200	≤600	120	60	1:01	24	3	9
				48
DZWT180	1800	≤900	150	70	25:1	24	4	11
						36	5.5	14
DZWT250	2500	≤1250	150	70	25:1	24	5.5	14
DZWT350	3500	≤1750	80	75	25:1	18	7.5	19
DZWT500	5000	≤2550	80	75	25:1	18	10	26

2.2. Product appearance

2.2.1. See figure 69-3 and table 69-2 for the overall dimensions of DZWT series integrated regulating valve electric device

Table 69-2 outline dimensions of DZWT series integrated regulating valve electric device

Model	H	H₁	L	L₁	F	F₁
DZWT10, DZWT15	300	130	500	360	370	220
DZWT20, DZWT30	300	130	570	360	370	220
DZWT45, DZWT60	430	200	670	440	460	270
DZWT90, DZWT120	460	200	720	450	470	270
DZWT180, DZWT250	600	250	850	520	710	410
DZWT350, DZWT500	670	250	980	580	650	410

2.2.2. See figure 69-4 and table 69-3 for connection dimensions of DZWT series integrated regulating valve electric device

3. Selection method

First, the output torque value is calculated according to the condition of valve and field matching, and then the matching electric device is selected through the performance parameter table of electric device. See table 69-4 and table 69-5 for supporting conditions

Table 69-4 matching of electric device of DZWT series integrated regulating valve

Table 69-5 matching conditions of 2SAR series integrated regulating valve electric device

When ordering, it should be selected according to the actual working conditions, mainly including the following parameters:

3.1. Electric device series

3.2. Rated torque

3.3. Output connection form

3.4. Output torque

3.5. Other technical parameters (such as thrust type, etc.).

4. Scope of supply

Including the operation manual, valve electric device, nameplate, product certificate, product operation manual and packaging required for the manufacture, installation and commissioning of the product.