The vacuum system consists of vacuum pumps, pressure stabilization tanks, gas–liquid separators, and connecting pipelines. The vacuum pump generates a vacuum, which is then distributed to each sand box via a vacuum distributor, providing sufficient suction to prevent the mold sand from collapsing during pouring.

I. System Components and Functions

1. Vacuum Pump
The 2BE series water-ring vacuum pumps are high-efficiency, energy-saving products developed by our company based on years of research, production experience, and advanced imported technologies.

· Function: Used to extract air or other non-corrosive, water-insoluble gases to create a vacuum or maintain process-required pressure in a sealed container.

· Purpose in Casting: Provides the vacuum needed during pouring, ensuring a stable vacuum field in the sand boxes.

2. Pressure Stabilization Tank & Gas–Liquid Separator

· Function: Filters solid particles from the extracted gas using water, stabilizes vacuum pressure, separates gas and water, and further removes solids from the air before discharge to prevent air pollution.

· Benefits: Maintains a stable and reliable vacuum; the vacuum pump operates efficiently with low wear, high durability, and easy maintenance.

3. Application in Sand Boxes

· Vacuum extraction removes air between sand grains, compacting the sand and forming a stable mold inside the sealed sand box.

· During casting:

o Accelerates gas evacuation and reduces total gas volume.

o Lowers gas pressure at the metal–mold interface.

o Speeds up the advancing metal flow front, improving mold filling.

o Reduces surface carbon defects.

o Suppresses combustion of foam pattern materials, promoting gasification.

o Improves the environment, increases metal fluidity, moldability, and clarity of casting contours.

· Higher vacuum levels further suppress foam pattern combustion, accelerate pyrolysis and decomposition, shorten residence time of pyrolysis products in high-temperature zones, and reduce the likelihood of deep pyrolysis.

II. 2BE Series Water-Ring Vacuum Pump Parameters

Note: Pumping capacity, speed, and power are ranges. The performance of a single water-ring vacuum pump varies with its rotational speed.
Example: Model 2BE1-253-820 (speed) – 75 kW has a maximum pumping capacity of 42.7 m³/min.

This system ensures stable vacuum creation, optimal sand compaction, improved casting quality, and environmental safety in lost foam and precision casting processes.

Zibo Tongpu Vacuum Equipment Co., Ltd. is located in the industrial machinery manufacturing base of China, the hometown of QlLU culture----.Gaoqing economic development zone, Zibo city of Shandong province.

Zibo Tongpu is a professional manufacturer that specialized in lost form and V-method casting equipment and all kinds of vacuum pumps. Here brought together a large number of science and technology workers at lost form and V-method casting for many years that have the rich experience. They are not only proficient in lost form and V-method design and manufacture of theoretical knowledge, but also have rich practical experience. So the equipment's new design could be more close to the users, more in line with the actual needs.

Zibo Tongpu founded in 2005, for the user to manufacture a number of lost form and V-method production lines successively. Including fully-automatic and semi-automatic production lines, but also tailored to the user's simple production line. Our products have a broad market, covering more than twenty provinces, cities and autonomous regions across in China. At the same time, exported to Thailand, South Korea, Taiwan, Vietnam, Indonesia, and Kazakhstan, Russia and so on countries and regions.

Zibo Tongpu has strong technical development and technology service capabilities. We can provide not only reliable casting equipment, but also lost form and V-method molding technology service. Meanwhile, we also undertake "turn-key" projects, according to customers’ demand. Besides, we have set up a foundry plant which adopts the lost form and V-method molding technique as main means of production so as to provide test base for customers to carry out first-phase product testing and stuff training. We provide a variety of services to need of customers at different levels.

We can willing to provide you our best and most sincere service! Let us join hands and work together for common development and growing. and achieve even greater glory. 

Zibo Tongpu can offer the following services:

One, Product trial: In the experimental base can be carried out with the early production development, to form a complete product technology and economic parameters report.

Two, Engineering design: Can provide the most optimized engineering design, the most reasonable process, the most economical investment costs, the most economical running costs

Three, Pre-sale service: Timely provide the prefect technical and business consulting, free to the field survey, technical communication with customers, and Professional design according to customer's requirement.

Four, Sale service: At the same time of equipment manufacture, responsible for the relevant personnel of the technical training, provide perfect technology solution, to ensure the project on schedule.

Five, After-sales service: have regular review system, listen to customer Suggestions. Establish customer service files, provide free lifetime technical support. No matter inside and outside the warranty period the received information respond immediately.