BEST QUALITY Coal seam water injection hole sealing device

C 1,Application:
It is used for coal water injection, dust falling, coal pressure reduction, coal cracking, gas drainage, etc.
2,Function:
1 By injecting water into coal mass, some of the gas can be discharged, thus the gas content of the coal mass can be effectively reduced.
2 If water injection achieves the desired effect, the dust can be redued by more than 80%, thus improving the working environment and avoiding dust explosion accident. 
3 It can dampen the coal and prevent spontaneous combustion of coal.
4 It uses high pressure water injection to break the coal mass, so as to reduce fire work products, reduce the cost and improve the security of workers.
5 It breaks the coal with hole sealing device, thus effectively preventing coal and gas outburst and explosion.
3,Structure:
The hole sealing device is composed of high pressure rubber expansion hose, relief valve, and quick connector.
4,Technical Papramenters:
Sealing diameter: 30-120mm (can be processed according to customer’s requirements)
Working pressure: 1-8Mpa(can be processed according to customer’s requirements)
Start-up pressure of relief valve: 0. 4-0. 5Mpa  
Working flow: water injection 4t-4.5t/h
Sealing depth:1m-8m
Hose expansion coefficient: 60%-100%
5,Operation Guides and Precautions:
1 The coal seam water injection hole sealing device is easy to use. You only need to connect the hole sealing device to the waterway on the working site and fully insert the hole sealing device into the borehole. Under certain pressure, the hole sealing device hose expands to realize hole sealing and water broken blasting.
2 The coal seam water injection hole sealing device can be used repeatedly for serveral times. After water injection, remove the pressure, and the hoel sealing device can get back into shape, then you can take the devie out.
3 It is forbidden to insert and take out the device with pressure.
4 Please ensure nobody is working in front of the hole sealing device when it is operating.

Hebei Lianxing Rubber and Plastic Co., Ltd. is located in Hengde Industrial Park, at the junction of Shandong and Hebei. We currently employ 89 people, including 3 managers, 30 engineering technicians (including 3 senior engineers and 16 engineers). Our company covers an area of 51000m2, including 17000 m2 for work shops. Now we have a total assets of 60000000 yuan, including 40000000 yuan in fixed assets. We are an innovative company integrating research and development, production, technology innovation and sales.

We have more than 100 sets of safety production equipment including knitting machine, winding machine, flat vulcanizing machine, rubber and plastic pressure kneading machine, vulcameter without rotator, tensile testing machine, testing equipment, etc.

The main products of our company are: high pressure wire braided hose, super high pressure wire spirally-wound hose, hydraulic hose, coal mine hydraulic support hose assembly, expansion hose (water injection hole sealing device), drilling hose, hose connectors, wear-resistant sand blast hose, cloth inserted hose, heat-resistant steam hose, rubber water hose, large diameter hose, metal hose and various kinds of hose assembly.

1. Are you a manufacturer or trading company?

We are a professional hydraulic hose fittings manufacturer with ten years' experience. We have done business with our customers well.

2. What is payment method?

For samples: T/T, western union.

For orders: T/T or L/C. 

3. Do you offer free samples? 

We can provide free samples and you should pay the freight. After you place an order, we will give back the freight. 

4. Do you offer OEM service and can you product as our drawings?

Yes. We offer OEM service. We accept custom design and we have a professional design team who can design products based on your requirements. And we can develop new products according to your samples or drawings. 

5. Do you accept our design on boxes? 

Yes. We accept custom design on boxes. 

6. What's your delivery time? 

Generally, we will arrange shipment within 15 days after receiving the deposit. If urgent, we can also meet your requirement.

7. Is your price higher than other companies? 

Since we have been a professional manufacturer for many years, we can control our quality and costs well. So our prices are very competitive. And we dedicate to establishing long-term and friendly relationships with all the customers.

8. How do you control the quality?

We will arrange sample confirmation before production. During the production, we have professional QC staffs control the quality and manufacture in accordance to the confirmed sample. We will also guarantee the accuracy of packaging and send you shipping sample. Welcome to our factory to inspect.