Temperature instrument selection principle - Wuzhong instrument

Valves are the most common equipment in chemical enterprises and play a great role. They seem to be simple and easy, but in the actual operation process, they also need to meet the relevant technical requirements, otherwise they will cause safety accidents. Only the valves related to our liquid level appearance are introduced here, and other equipment is not analyzed. ...

(1) The conditioning valve belongs to the on-site dashboard, and the regular working temperature should be in the range of -25-60 °C, and the air humidity should be ≤ 95%. If it is installed outdoors or in a high-temperature place, moisture-proof and temperature-reducing measures should be used. In areas where there is an epicenter, it is necessary to eradicate the source of vibration or improve vibration isolation measures. ...

The active circulation valve is a pump protection device. It actively protects the centrifugal pump (especially the hot water medium) from partial cavitation damage and instability that may occur in the pump body when operating at low load. Once the pump flow rate falls below the preset flow, the bypass is completely opened to ensure that the pump needs a small flow rate. Namely...

The selection of control valve is a very complex thing, in order to ensure the use of control valves, customers only need to provide process parameters and use requirements to valve manufacturers, because valve manufacturers have rich experience in valve use, so they can provide customers with the best cost-effective valve products. ...

Pneumatic butterfly valves are usually composed of a combination of pneumatic actuators and valve bodies and some accessories after debugging. This article first introduces the precautions for the on-site application of pneumatic butterfly valves. 1. The control cabinet sends a signal that the valve does not move, and the pneumatic conditioning butterfly valve is in the device locator after on-site investigation.

Pneumatic ball valves are ball valves with pneumatic actuators. The detailed classification of pneumatic ball valves includes: stainless steel pneumatic ball valves, plastic pneumatic ball valves, sanitary pneumatic ball valves, carbon steel pneumatic ball valves, two-way pneumatic ball valves, three-way pneumatic ball valves, and four-way pneumatic ball valves. ...

There are a total of eight functions of the conditioning valve, and the eight functions of the full-function ultra-light conditioning valve are excellent, so it is called "full-function valve". 1. The conditioning function is one of the main functions of the conditioning valve, which is manifested as (1) flow characteristics; (2) Adjustable ratio R; ...

In all kinds of mechanical connectors, the anti-loosening of bolts is a very important link. So can the tension spring washer be loosened? The principle of anti-loosening of the tension spring washer The anti-loosening principle of the tension spring washer is that after flattening the tension spring washer, the tension spring ...

The self-operated control valve, also known as the self-operated control valve, is based on the pressure and temperature of the medium flowing through the valve itself as an energy source, and uses the reaction signal (pressure, pressure difference, temperature) at the output end of the valve to be transmitted to the actuator through the signal tube, and then drives the valve disc and then changes the opening of the valve to achieve the adjustment pressure.

On December 2, 2019, the China-Russia East Route Natural Gas Pipeline Project was officially put into operation. The large-diameter pressure regulator jointly developed and manufactured by Wu Zhong and China Petroleum Pipeline Branch was put into use at Changling Natural Gas Transmission Station in Jilin Province and successfully ventilated. ...

Routine maintenance of pneumatic conditioning valves When the conditioning valve is packed with graphite-asbestos, lubricating oil should be added to the packing once in about three months to ensure that the conditioning valve is flexible and easy to use. If it is found that the pressure cap of the packing is very low, the packing should be compensated, such as the PTFE dry packing is found to be hardened ...

(1) The dispatching valve belongs to the on-site dashboard, and the standard working temperature should be in the field of -25-60 °C, and the air humidity should be ≤ 95%. If it is installed outdoors or in a high-temperature place, moisture-proof and temperature-reducing measures should be used. In areas where there is an epicenter, it is necessary to eradicate the source of vibration or improve vibration isolation measures. ...

Two-position five-way solenoid valve is a pneumatic component commonly used in gas-electric automatic control system, its main use is to control the double-acting cylinder to complete the automatic switching of the air circuit, widely used in the pneumatic equipment of various industrial parts, to complete the automatic control and long-distance operation in the production process, it has the ability to ...

Classification of valves, types of structures, functional applications, pressure levels, temperature classifications, valve body data classifications, and general classifications The types of valve products are complex, and the statements are inconsistent, some are divided according to the use (such as chemical valves, oil valves, oilfield valves, power station valves, etc.), and some are according to the medium.

The actuator of the control valve has pneumatic type, electric type and electro-hydraulic linkage type, and the pneumatic equipment is divided into barrier type and cylinder type. Depending on the action when the operating signal and the drive source disappear, the actuator has a forward type, a reverse type, a non-directional type, and a persistent type. The positive type is used in the operation signal and drive ...

Pneumatic cylinders and hydraulic cylinders are two common components in the mechanical field, both of which have the functions of transmitting energy and converting energy. Although the two seem to be similar, there are still great differences in the operating principle, application field, operation method, and application effect. ...

Valve application requirements (1) General gate valves, ball valves, and globe valves are prohibited from dispatching according to their structural characteristics. However, in process design, it is widely used for mediation. Because of the scheduling application, the valve seal has been in a throttling state for a long time, and the impurities in the oil have washed the seal, endangering the seal.

1. Elastic ball valve (i.e. orbital ball valve) The elastic ball valve is the orbital ball valve, and its ball is elastic. The ball and the seat seal ring are made of metal materials, and the specific pressure of the seal is very large, and the pressure of the medium itself can not meet the requirements of the seal, so it is necessary to apply external force. This...

When using stainless steel multistage pumps, it is first necessary to confirm the usefulness and functional parameters of the multistage pump and select the pump type. Criteria and basis for the selection of multistage pumps: 1. Make the type and function of the selected multistage pump fit the process parameters such as flow, head, pressure, temperature, NPSH, suction stroke, etc.

Valve is a kind of commonly used hardware products, the valve also has certain technical requirements before assembling and in the process of the device, otherwise the assembled valve may not reflect its own excellent function, what are the technical requirements of the valve in the assembly process? ...