这里有精品在线视频_www.久久亚洲_国内成人免费视频_免费五级黄高潮片90分钟观看_91视频免费在观看_91国内视频在线

ZZWPE Self-electric Temperature Control Valve product description:

ZZWPE Self-electric Temperature Control Valve (for larger caliber and thermal oil control) produced and sold by Baigang valve group, the valve features only the most common 220V power supply, the use of the media itself is adjusted to the energy directly to the steam, hot water, hot oil and gas and other media The temperature of the implementation of automatic regulation and control, can also be used to prevent overheating or heat exchange occasions, the valve structure is simple, easy to operate, the selection of a wide range of temperature control, fast response time, reliable sealing performance, and can be adjusted during operation , Which is widely used in chemical, petroleum, food, textile, hotels and restaurants and other departments of hot water supply.

ZZWPE Self-electric Temperature Control Valve part Information:

◆ Structure and Principle
Control valve consists of main valve, intelligent actuator and sensor composed of three parts, according to user needs, respectively, heating and cooling of two structures. 
1. The structure and principle of the heating control valve, see the attached diagram: 
Before work, the main valve core is in the half-open position and the sensor is in a natural state. Connect the power, the main spool fully open. The medium flows into the main valve body in the direction of the arrow, and the heat storage tank is heated by the valve core. When the temperature rises to the corresponding set value, the sensor generates a corresponding linear signal input integrated intelligent actuator, then drive the stem, the valve spool displacement, turn off the main valve to stop heating. When the temperature is lower than the set value, the sensor generates a linear signal input to the actuator, which drives the valve element to be involute, allowing the medium to flow into the thermal storage tank according to the parabolic characteristic and heating up to the set value. This controlled media is always in the set temperature range is controlled, so as to achieve the purpose of temperature control. 

ZZWPE Self-electric Temperature Control Valve technical Parameters:

◆ The main parameters and materials

1, the main parameters table

◆ supporting the use of electric actuators related technical parameters

* The table data is only conventional configuration, the specific selection based on the main parameters and user requirements.

ZZWPE Self-electric Temperature Control Valve connection standard:

◆ connection size and standard
· Flange standard: Cast iron flange according to GB4216-84, Cast steel flange according to GB9113-88 
· Flange sealing surface type: PN10, PN16 convex PN40, PN64 concave surface, the valve body is concave 
· Structure length: GB12221-89 Jacket 
Insulation Jacket Heating Body Interface: Butt Weld φ18 × 4 
* The body flange and flange end face distance can be manufactured according to user-specified standards. Such as ANSI, JIS, DIN and other standards. 
◆ Ordering Information When 
ordering, please provide the following information: 
· Control valve name and model 
· Nominal diameter (mm) 
· Nominal pressure (MPa) 
· Rated flow coefficient (Kv) 
· Fixed flow characteristics 
· Media name, valve pressure, temperature , Flow rate, etc. 
· The whole machine mode of operation (electric open, electric) and the input signal 
· Body, valve trim and packing material 
· Accessories (manipulators, servo amplifiers, etc.) 
· Other special requirements