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RTV-1 silicone is a condensed silicone rubber that is gradually cured from outside to inside by contacting with moisture in the air. It can be also called non conductive silicone sealant. RTV-1 silicone rubber are used in bonding, sealing, encapsulating photovoltaic module components including photovoltaic frame, junction box and micro-inverter, power industry including circuit boards, electronic components, light emitting diode industry including lamp beads, lamp cap and light bar, home appliance including air conditioner, fridge, washing machine, and microwave oven, induction cooker, new energy vehicle including electronic component. GOLOHO RTV-1 silicone rubbers are designed to provide long-term bonding, sealing, encapsulating and protection against moisture, environmental degradation, mechanical and thermal shock, heat dissipation and vibration where a room-temperature-curing product is preferred.

When using RTV-1 silicone rubber, all surfaces must be clean and dry. Degrease and wash off any contaminants that could impair adhesion. Suitable solvents include isopropyl alcohol, acetone, or methyl ethyl ketone. Apply a bead of RTV-1 silicone rubber to one of the prepared surfaces, then quickly cover with the other substrate to be bonded. On exposure to moisture, the freshly applied material will “skin over” in about 10 to 15 minutes at room temperature and 50% relative humidity. Any tooling should be completed before this skin forms. The surface is easily tooled with spatula. GOLOHO RTV-1 silicone rubbers will be tack free in about 5 to 60 minutes. After skin formation, cure continues inward from the surface. In 24 hours (at room temperature and 50% relative humidity), GOLOHO RTV-1 silicone rubbers will cure to a depth of 2 to 3 mm. Very deep sections, especially when access to atmospheric moisture is restricted, will take longer to cure completely. Cure time is also extended at lower humidity levels. Before handing and packaging bonded components, users are advised to wait a sufficiently long time to ensure that the integrity of the adhesive seal is not affected. This will depend on many factors and should be determined by user for each specific application.

GOLOHO POLYMER is an industry leader in the production field of rtv grease. If you want to know more details or want a quotation, just feel free to contact us!

MFI Magnetic flux leakage test refers to the formation of a leakage magnetic field on the surface of a test piece after it is magnetized due to defects on the surface or near-surface of the test piece. People can detect defects by detecting changes in the leakage magnetic field.

Briefly describe the limitations of the magnetic flux leakage detection method.

The limitations of the magnetic testing equipment are as follows:

1. It is only applicable to ferromagnetic materials.  
2. Detection sensitivity is low.
3. The quantification of defects is rough.  
4. Due to the shape of the workpiece to be inspected, the leakage magnetic field method is not suitable for detecting test pieces with complicated shapes because the sensor detects the leakage flux.  
5. Magnetic flux leakage is not suitable for cracking very narrow cracks, especially closed cracks. It was found in the experiment that cracks with very narrow cracks, magnetic particle flaw detection and magnetic flux leakage inspection failed to produce an indication of injury and injury.

Briefly describe the application range of magnetic flux leakage detection technology.

1. The application of magnetic flux leakage detection in the steel industry: in steel mills, it is mainly used for inspection of steel structural parts, billets, round bars, bars, steel pipes, welds and steel cables. Make sure the finished product is in good condition. On many occasions, users will not receive steel products that have not been inspected by steel mills and third parties.  Users often use non destructivetesting equipment before manufacturing, which ensures the manufacturer's technical requirements for the product. Such inspections are often carried out by an independent inspection company or the user's quality assurance department.  
2. The application of magnetic flux leakage detection in the petrochemical industry: the installation of oil and gas pipelines (including buried pipelines), storage tank floor or the recovery of oilfield steel pipes.  
3. Other applications: regular in-service inspection of used steel cables, wire ropes, and chains.

BKN's benchtop magnetic flux leakage testing equipment are capable of detecting workpieces efficiently and accurately.

Technical Characteristics of MFL101 Tank Floor MFL Scanner

Unique full modular structure, from the main body of the computer mechanism the handle of MFL101 Tank mfl tank floor scanner can be quickly folded, disassembled. It is easy to transport and access manholes. With humanized operation design, the height of armrest and adjustable angle, suitable for different operators. Precise signal conditioning circuit. The four-layer PCB with mixed power excellent performance. data word signal processing system, super computing power, advanced evaluation algorithm.

High-performance touch industrial tablet. The operation is very convenient does not require a keyboard and mouse. Unique probe design. It can pick up the magnetic flux leakage signal to overcome the unwanted signal caused by the eddy current effect. The number of physical channels is up to 32. High-performance lithium battery pack, which is at least 50% lighter than the equivalent capacity lead-acid battery Software design that can be operated efficiently.

All scan parameter settings graphical, intuitive, and easy to use, dramatically increasing the speed of operation and avoiding errors. The magnetization is quickly adjustable. By adjusting the ground clearance the magnetic pole, the magnetization of the detection target plate can be quickly changed to meet the requirements of detecting the thickness and minimize the gravity of the instrument and the bottom plate. This design allows the instrument to adapt to a wide range of floor thicknesses and reduce operator effort, increasing battery life.

Different degrees of non destructive testing machine are represented by non-color blocks. Online analysis of corrosion degree and position, position coordinates can be displayed in a table or on a scan.

MFL101 Tank Floor Scanner Performance Parameters Host:

Industrial tablet computer interface:

Chinese Working principle: Magnetic flux leakage method:

NdFeB permanent magnet Channel number: 32

Scan width: 260mm

Drive mode: DC brushless motor, worm gear reducer, The motor can be raised.

Convert manual and electric drives at any time.

Detection speed: 0 m / s~0.7m /s step-less adjustable

Detection thickness: 8-20mm Penetration coating: non-magnetic

Penetration thickness: <4mm

Sensitivity: can be set (8-12mm thick 20 % material loss of the bottom plate, 40% material loss of the 12-20mm thick bottom plate

Data storage: local hard disk storage, USB disk dumping

Real-time analysis: Yes

Offline software

Battery specification: 14V40AH

Detection picture

The system is suitable for the automatic detection of various internal and external defects of steel pipes. The principle of ultrasonic flaw detection is that after the ultrasonic wave is coupled into the steel pipe through water, the incident propagation will cause ultrasonic reflection when there is a defect in the pipe. The ultrasonic instrument will alarm the ultrasonic reflected signal after realizing the signal to realize the automatic detection of the defect; Transmission ultrasonic pipe testing equipment is currently the advanced detection equipment in China.

Wireless Transmission Pipe Ultrasonic Flaw Detector Introduction

Rotating probe configuration

1.Probe configuration on the spindle section 1

A total of 3 probe adjustment frames are placed on section 1 at 120°apart.  Each of the adjustment frames is equipped with a 2-channel combined ultrasonic line focusing longitudinal probe to detect longitudinal defects of the steel tube in a clockwise direction.

Detection of defects: Vertical and vertical defects in the steel pipe are detected in a clockwise direction.

Center frequency: 5.0MHz±10%

Coupling method: water immersion method

Quantity: 3 sets of probes, each consisting of 2 wafers. These 3 sets of probes are evenly distributed in the circumferential direction of the workpiece, spaced 120° apart, on the same section. A total of 6 channels of water immersion probes.

2.Probe configuration on the main shaft section2

A total 3 probe adjustment frames are placed on section2, separated by120°, and a 2-channel combined ultrasonic line focusing longitudinal probe is arranged on each adjustment frame to detect longitudinal defects of the steel pipe counterclockwise.

Detection of defects: counter-clockwise detection of longitudinal defects inside and outside the steel pipe.

the center frequency: 5.0MHz ± 10%

coupling method: water immersion method

Quantity: 3 sets of probes, each consisting of 2 wafers. These 2 sets of probes are evenly distributed in the circumferential direction of the workpiece, spaced 120° apart, on the same section. A total of 6 channels of water immersion probes.

Defect detection standard of Non Destructive Testing Equipment

Inspection of Longitudinal and Transverse Defects in Ultrasound Steel Pipe: GB/T5777-2008 L2(C5) Standard

Wireless Transmission Pipe Ultrasonic Flaw Detector Performance

We are one of the leading ultrasonic flaw detector manufacturers, RFQ today!

Automatic EDM equipment is the ideal equipment for processing artificial defects of pipe rod standards in non-destructive testing work. The flaw detector has the characteristics of simple operation, safety and reliability, high production precision, fast processing speed, and convenient carrying by ultrasonic flaw detection. It can process artificial defects on non-ferrous metals and ferrous metal tubes and bar standards. Hardness sorting can process longitudinal, transverse, and oblique rectangular groove injuries on the inner and outer surfaces of the tube and rod. The core part of the ndt equipment adopts advanced digital processing technology and system integration technology. With modern advanced digital control and servo technology, the injury process is fully automated, with high processing precision, fast speed, easy operation and performance at the international advanced level. The entire instrument is portable and easy to carry and has low requirements for the environment of steel pipe scratching.

How electronic fence works

After the pulse generator (main unit) is energized, the transmitting port sends a pulse voltage to the front fence. The time interval is about 1.5 seconds, and the pulse stays on the fence for about 0.1 second. After the loop is formed on the front fence, the pulse is returned to the host for reception. Port, this port receives the feedback pulse signal; the host also detects the resistance between the two transmitters. If the front fence is broken and the circuit is broken or shorted, the receiving port of the pulse host can not receive the pulse signal or the resistance between the two transmitters is too small, the host will issue an alarm.

Fence alarm

Through the working principle of the electronic fence, no matter what voltage working state the pulse host is in, when the fence is damaged, the receiving port can not receive the pulse signal, the pulse host will alarm; similarly, when the two electronic cables are short-circuited When the resistance is very small, the pulse master will also alarm.

We are one of the leading non destructive testing equipment manufacturers, RFQ today!

Basic Information

This non slam check valve prevents backflow of media and reduces water hammer to achieve the safe and quiet effect.

Features

1. Small fluid resistance, large flow;
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2. Automatic control using medium energy;

3. Prevent water hammer phenomenon;

4. Slowly-closing silencing.

Principle

When the pipe supplies water from the inlet end of the valve, the water from the needle valve and one-way valve enters the valve cover control room and then is discharged downstream through the ball valve. Due to the small opening of the needle valve, the discharge speed of the control room is greater than that of the inlet to replenish water, thus reducing the pressure in the control room. The inlet pressure acting under the main valve disc all the time lifts the main valve disc, thereby opening the main valve disc and supplying water downstream. When the pipeline stops supplying water, the downstream water begins to flow back. Due to the effect of the one-way valve, the backflow water cannot flow out after entering the valve cover control room through the ball valve. As a result, the pressure of the valve cover control room increases gradually and the main valve disc is closed tightly.

Installation and Commissioning

Needle valve and ball valve adjust together to get the best opening or closing speed. For specific use, please consult ZhengFeng Valve Group.
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Product scope , Standards & Materials

Size Range: 2"~24"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2

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