The overflow valve of the solenoid valve of the large road sweeper has a failure of the line of the check valve and the overflow valve, which will cause the hydraulic mechanism of the hydraulic system part of the large road sweeper to fail to operate normally. In severe cases, even the entire vehicle's hydraulic system may be paralyzed. What caused the situation of the check valves in the overflow valve of a large road sweeper ?  

1. Impurities in the hydraulic oil tank of a large road sweeper plug in the spool can cause a relief valve check valve condition.

2. Under long-term use, the overflow valve spool of a large road sweeper will be damaged. If there is damage to the spool, it needs to be replaced in time.  

When the relief valve of a large road sweeper has a check valve, the first step is to disassemble the relief valve and use an air gun and diesel for cleaning. The relief valves of large road sweepers are installed in large boxes, while the relief valves of small road sweepers are installed behind the cab. When disassembling the relief valve of a large road sweeper, it is necessary to raise the large box of the vehicle. When disassembling the valve, it is necessary to notice the size of the spring in the valve plug and the installation order of the valve plug. After cleaning, use your hand to push the lower valve plug. If it is found to be unobstructed when going back and forth, it is necessary to replace the new set of overflow valves.  

After the secondary engine of the large road sweeper is started, observe if there is any abnormal condition in the lower oil pump, and use the poppet button of the Phillips screwdriver Koto Relief Valve. Observe that the pressure gauge under the relief valve shows no pressure. If the pressure gauge is under pressure, then the hydraulic system is still not able to perform normal operation at this time, then the line of the overflow valve has a failure. When a large road sweeper is used for a long period of time, a longer period of jitter will easily result in loosening and falling off of the wire in the operation box. When performing a line fault check, the underflow can be observed. The indicator light above the valve, under normal use, the indicator of the relief valve is always on under the condition that the switch of the operation box has reached the working condition. If it is during normal use, the individual valve set of a large sweeper vehicle cannot be operated normally, but other valve sets can still operate normally. The electromagnetic valve of the valve set can be contaminated. The result is a stuck valve. The second possibility is that there is a line fault in the valve group.

High Frequency Welding Tube Mill

Our High Frequency Welding Tube Mill is intended for manufacturing of round pipe of Φ16mm-Φ127mm with thickness of 0.5 mm–5.0 mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank with its subsequent welding into tube, edge heating by means of solid state high-frequency welder, longitudinal seam welding in rolls of tube welding machine, cooling, further sizing or shaping and on-stream cutting of endless tube in measured lengths. 

Finished product can be of round, square or rectangular pipes.

a) High Frequency Welding Tube Mill Specifications:
Pipe diameter: Ø16–Ø127mm
Pipe Thickness: 0.5– 5.0mm
Pipe Length: 6-9m

Length Tolerance: 0-3mm

b) High Frequency Welding Tube Mill Steel Tape Specifications:
Material: Low Carbon steel (δb≤500Mpa, δs≤235Mpa)

Inner diameter:   Î¦580-Φ610mm

Outer diameter:   Î¦900-1500mm
Strip steel thickness: 0.5mm-5.0mm

The maximum weight: 5.0 tons

c) High Frequency Welding Tube Mill Electricity:
Dynamic power:  AC380V±10%, 3phases, 50Hz±10%
Control Power: AC220V±10%, one phase, 50Hz ±10%

Electric installed capacity: appro 450KW

e) High Frequency Welding Tube Mill Cooling water:
Reservoir for High Frequency equipment:15 m³, one set
Reservoir for circulating cooling water:15 m³, one set
f) High Frequency Welding Tube Mill Compressed air:
Pressure: 0.4Mpa
Flow: 0.5m3/h

g) High Frequency Welding Tube Mill speed: 

30-90m/min

Why choose to cooperate with us ?
1. We are professional manufacturer, so we can offer better price and after-sale service and shorter delivery time.
2. We have strong design & technical ability, we can design and manufacture as customer's requirement.
3. Our factory has been approved ISO 9001 certificate.
4. We have much experience for installation and training experience overseas.
5. We have successfully exported our machines to more than 90 countries, We all get good feedback.
6. We provide a free two years warranty for all our items.

7. OEM brand.

High Frequency Welding Tube Mill FAQ:
1.How to get a quotation of tube rolling line ?
Give me the diameters and thickness for the pipe .
Other spicific requirements is welcome, such as the speed,power and voltage you want.
2. Terms of payment ?

30% T/T, Balance to be paid before shipping after inspection.Also we accept the payment L/C, O/A , D/P.

3. What is your after-sale service ?

High Frequency Welding Tube Mill warranty period is 24  months, if the broken parts can't be repaired, we can send new to replace for free, but you need to pay the express cost yourself. we supply the technical support for the whole life of the equipment.

4. How to visit your factory ?

a.Fly to Beijing airport: By high speed train From Beijing Nan to Cangzhou Xi (1 hour), then we can pick up you.
b.Fly to Shanghai Airport: By high speed train From Shanghai Hongqiao to Cangzhou Xi(4.5 hours), then we can pick up you.

Steel Pipe Roll Forming Machine

Steel Pipe Roll Forming Machine,Carbon Steel Pipe Making Machine, High Frequency Welding Pipe Making Machine,Steel Pipe Making Machine

Zhongtuo Roll Forming Machinery Co., ltd , https://www.rollsformingmachines.com