SK-3 3m3/min water circulation vacuum pump for toilet vacuum truck

- Pump Model: SK-3
- Inspiratory capacity: 3m3/min (180m3/h)
- Vacuum: - 0.093MPa
- Rotary: 1450 rpm
- Power:5.5kW
- Purpose: for toilet truck,vacuum truck,etc
- Whatsapp/wechat:+8618307220638
- Email:[email protected]
- Http://www.cnclwgroup.c

SK-3 3m3/min water circulation vacuum pump for toilet vacuum truck
(Suitable for small vacuum septic tank truck volume from 1500 liter ~ 3000 liter)

1、 Purpose and scope of use
SK series water circulating vacuum pumps and compressors newly developed by Chengli Special Automobile Co., Ltd. are used to pump or press gases and other corrosive gases that are insoluble in water and do not contain solid particles, so as to form vacuum or pressure in sealed containers and meet the requirements of process flow. A small amount of liquid is allowed to be mixed in the inhaled or compressed gas.
SK series water circulating pumps and compressors are widely used in machinery, petroleum, chemical, pharmaceutical, food, ceramics, sugar, printing and dyeing, metallurgy, electronics and other industries.
Because the gas compression of this type of pump is carried out under the isothermal state in the working process, it is not easy to cause danger when pressing or pumping flammable and explosive gas, so it is more widely used.
Meaning of Pump Model Letter:   SK - 3
  • SK: water circulating
  • 3: maximum air inspiratory capacity is 3 m3/min

Main Technical Parameters:

SK Series Water Circulating Vacuum Pump & Compressor Technical Parameters

Model Inspiratory Capacity
Ultimate vacuum Power (kW) Rotary Speed
Water Consumption
Max Vacuum is -450mmHg mmHg MPa Vacuum pump Compressor Inlet Outlet
SK-3 3 2.8 - 700 - 0.093 5.5 7.5 1450 0-0.1 70 70 15-20
SK-6 6 5.4 - 710 - 0.093
11 15 1450 0-0.1
80 80 20-30
SK-9 9 8.1 - 710
- 0.093
15 22 1450 0-0.1
80 80 30-40
SK-12 12 11 - 710
- 0.093
18.5 30 970 0-0.1
80 80 40-50
SK-15 15 13.5 - 710
- 0.093
30 37 970 0-0.1
80 80 50-60

2、 Working principle
As shown in Pic (1), the impeller 3 is eccentrically installed in the pump body 2. When the impeller 3 is started, a certain amount of high temperature water is injected into the pump. Therefore, when the impeller 3 rotates, the water forms a water ring 5 on the inner wall of the pump body under the centrifugal force. The upper inner surface of the water ring is tangent to the hub and rotates in the direction of the arrow. During the first half of the rotation, the inner surface of the water ring is separated from the hub. Therefore, a closed space is formed between the impeller blades and the water ring. With the rotation of the impeller, The space is gradually expanded, the space gas compression is reduced, and the gas is sucked into the space. During the second half turn, the inner surface of the water ring is gradually close to the hub, the space between the blades is gradually reduced, and the space gas pressure is increased. When the pressure is higher than the exhaust outlet pressure, the gas between the blades is discharged. In this way, the space between the blades will suck and exhaust once every week of impeller transfer. Many spaces will work continuously, and the pump will continuously suck and compress gas.
During the working process, the work will generate heat, which will heat the working water ring, and some water and gas will be discharged together. Therefore, during the working process, the pump must be continuously supplied with water to cool and supplement the water consumed in the pump to meet the working requirements of the pump.
When the gas discharged from the pump is no longer used, a water separator (a water tank can be made to replace it) is connected to the exhaust end of the pump. After the waste gas and part of the water carried are discharged into the gas water separator, the gas is separated from the water, and the gas is discharged through the exhaust pipe. The water left is supplied to the pump through the return pipe for continuous use. With the extension of the working time, the working temperature will continue to rise. At this time, a certain amount of cold water (tap water) needs to be supplied from the water supply of the steam water separator, The reduced working water temperature ensures that the pump can meet the requirements and performance indicators.

When used as a compressor, the pump exhaust port is connected with steam water separation steam. The steam water mixture enters the water separator and is automatically separated. The gas is delivered to the required system through the exhaust pipe, and the working water is discharged through the automatic overflow switch. When the gas is compressed, the working water is very easy to heat. The water is discharged from the pump outlet and the temperature will become higher. Therefore, at the bottom of the steam water separator, cold water should be continuously supplied to supplement the hot water that is discharged, At the same time, it plays a cooling role, so that the working water temperature will not be too high, so as to ensure the compressor performance, meet the technical indicators and meet the process requirements.

3、 Structure Description of Vacuum Pump:

The vacum pump structure is shown in Pic 2, Pic 3

The vacuum pump is composed of pump body, two end covers, impeller and other parts. The intake pipe and exhaust pipe are connected with the pump through the suction hole and exhaust hole on the disc mounted on the end cover, and the impeller is eccentrically mounted in the pump body. The total clearance at both ends of the pump is adjusted by the pad between the pump body and the disc. The clearance between the discs on the impeller segment cover is adjusted by the impeller driven by the shaft sleeve (SK-3/6) or the back cap (SK-9/12). The clearance between the two end faces of the impeller and the disc of the end cover determines the loss and its limit pressure during the flow of gas from the air inlet to the exhaust port in the pump cavity.

The packing is installed in the covers at both ends, and the sealing water enters the packing through the small hole of the end cover. The cooling packing and sealing effect are strengthened. The make-up water required for the impeller to form the water ring is supplied by the water supply pipe, which can also be connected with the steam water separator for circulating water supply.

When the mechanical seal is used as the sealing form, the mechanical seal is installed in the packing cavity, the packing is omitted, the packing gland is replaced by the mechanical seal gland, and the other structures are the same.

The bearing is fixed to the shaft by a round nut.

The end cover is provided with a disc, which is provided with a suction hole, an exhaust hole and a rubber ball valve. The rubber ball valve is used to discharge the gas before the exhaust port when the gas pressure between the impeller blades reaches the exhaust pressure, reducing the power consumption due to excessive gas pressure and power consumption.

4、 Equipment Description

SK series water circulating vacuum pump and compressor system consists of vacuum pump (compressor), coupling, motor, steam separator and pipeline.

The working process of the vacuum pump, compressor and steam separator is as follows: the gas discharge pipeline enters the vacuum pump or compressor through the valve, and then is discharged into the steam separator through the gas guide elbow, and is discharged through the exhaust pipe of the steam separator. When it is used as a compressor, the gas water mixture discharged from the compressor is separated in the steam water separator, and the gas is transmitted to the gas system to be compressed through the valve, while the water is left in the steam water separator. In order to keep the water level of the steam water separator certain, an automatic overflow switch is installed. When the water level is higher than the required water level, the overflow switch is opened, and water overflows from the overflow pipe. When the water level is lower than the required water level, the overflow switch is closed, The water level in the steam water separator rises to the required level. The working water in the vacuum pump or compressor is supplied by the steam water separator (or tap water), and the water supply volume is adjusted by the valve on the water supply pipe.

The difference between gas suction and pressure delivery systems is that the internal structure of the steam water separator is different. When pumping gas, the pressure at the suction port is lower than atmospheric pressure, while the pressure at the exhaust port is equal to atmospheric pressure. The steam separator has only overflow pipe. When pressing gas, the pressure at the suction port is normal (or vacuum), and the pressure at the exhaust port is higher than one atmospheric pressure; In order to ensure the delivery gas pressure, the water level of the steam water separator is controlled by the overflow switch.

Suitable Fuel Tank Trucks Models for 100HYCB-100 Super Fuel Pump:

Packing & Shipping of Water Pump:

Chengli Special Automobile Co., Ltd. Has a Complete After-sales Service System

In order to make you always satisfied from purchasing, owning and using products, Chengli Special Automobile Co.,Ltd has a nationwide sales and service network to provide you with a full range of services.

◆Training Service

Jiangnan Company provides free expert training for all customers who purchase our products, and the training does not charge any fees.

◆Warranty Commitment

Customers can enjoy up to one year or 25,000 kilometers, and free replacement of parts (excluding wearing parts) damaged due to quality problems during the warranty period. The chassis part is guaranteed by the original factory at the national secondary service station nationwide, and the modified part is provided by our company with the service tenet of the customer being always right, and the service tenet of "customer care and caring for each car". Respond within 12 hours after receiving the letter for help from customers, and do not exceed 24 hours for door-to-door service in inland provinces and cities, and 48 hours for individual areas. Long-term supply of original accessories and accessories to provide accessories at preferential market prices. Overseas customers guarantee to reply within 24 hours and give guidance plan.

◆24 Hours Service

The service tenet is that the customer is always right, the service tenet is to care about the customer and every car, and make a public commitment to the society. , Shanghai, Guangdong, Zhejiang, Fujian, Hainan), no more than 24 hours in inland provinces and cities, and no more than 48 hours in individual areas.

◆Rescue Service

When the customer's vehicle cannot be repaired at the service station due to special reasons, the service station can provide on-site service of vehicles, personnel and accessories to solve the customer's difficulties to the greatest extent and reduce the customer's concerns about using the car.

◆Customer Return Visit

Chengli Special Automobile Co.,Ltd. implements the three-level return visit service of dealers, service stations and return visit consultants, caring about customers, helping customers understand and familiarizing themselves with cars, helping customers to actively digest potential hidden dangers in advance, and improving the effective service life of products. To ensure the interests of customers.

Order Process

     ①: Car purchase negotiation: Contact the vehicle model information parameters by telephone or on-site inspection to discuss the vehicle model, Beiqi Foton remote water supply forest fire truck price and related requirements.

     ②: Signing the contract: Both parties sign the vehicle purchase and sale contract and pay the contract deposit in advance (fax signing of the contract or on-site signing of the contract is acceptable).

     ③: Arrange production: Our company arranges workshop production according to the contract requirements.

     ④: Delivery of the vehicle: The vehicle is delivered and accepted, the balance of the vehicle is paid, and the relevant procedures are completed. For more detailed car booking process, please inquire!

Answers to the Questions that Customers Care About before Purchasing?

(1) Free maintenance plan and period?

1. Tracking service time: lifetime; 2. From the date of delivery to the customer, within the normal range of use, within 20,000 kilometers or within one year of free repair (excluding wearing parts and electrical parts), more than one year, only charge Parts fee; 3. Service arrival time: within the province, arrive within 24 hours; other areas, dispatch personnel within 24 hours; 4. During the annual flood control period, engineers and technicians are scheduled to visit regularly or irregularly to ensure timely failures Excluded, no fault active prevention.

(2) What is the price method of free post-parts supply?

1. Method: unified supply at the local Dongfeng/Jinan Heavy Duty Truck/Isuzu and other chassis technical service stations, according to user requirements or directly delivered by Chengli Special Automobile Factory; 2. Parts are only charged for the cost of production, and no other fees are added.

(3) After-sales service method?

The maintenance of the chassis part can be solved at the service station near the user's place of use. The maintenance of the special device can be done by telephone or fax. The supplier will send professional maintenance personnel to the place of use 24-28 hours after receiving the call from the user.

(4) Technical training program?

The supplier is responsible for free training of equipment users at the user's location before delivering the vehicle to the user, mainly on how to operate the hydraulic system and special devices for the driver to be familiar with the basic principles of this type of vehicle and the ability to deal with general failures.

(5) How to transport and load the vehicle?

According to the dimensions and weight of the vehicle or cargo, you can choose bulk carriers, ro-ro ships, container ships 20GP, 40GP, 40HQ, 40FR, etc.

(6) What is the time to pick up the car at the factory?

Self-pick-up time: Monday to Sunday, 08:00-19:00 (some self-pick-up points work hours from 9:00-18:00, in case of national holidays, the press release time shall prevail. focus on)

(7) Can't we go to China abroad? Want to see the car to see the factory how to do?

We can let users see the general situation of offices, factories, production scenes, and factories through video calls and shooting videos, and help foreign customers understand us. For users who order vehicles, they can watch the vehicle appearance, function demonstration videos, and other details through video inspection, so that users can grasp their order production progress and situation in real time. We will create high-quality and personalized special vehicles for each user according to the actual needs of users. You are welcome to visit the production strength and product technology on the spot, and we will provide you with the best service!

As vehicles change or emission standards upgraded, the specifications above are for reference. Please contact us for a latest quote!


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