VACUUM PUMPS GAUGES VALVES

Siemens Energy Broadens Clean Heat Treating Potential

Siemens Energy, a recognized manufacturer of gas turbines and other energy technologies, has selected an eco-friendly vacuum furnace with high-pressure gas hardening (6 bar abs.) and high vacuum for one of its production facilities.

The vacuum furnace from SECO/WARWICK, known as Vector®, will execute efficient and ecologically clean processes in a high vacuum range. Consisting of a dry pump, a Root’s pump, and five Oerlikon/Leybold turbomolecular pumps, the furnace will meet the manufacturer's restrictive requirements.

headshot of Maciej Korecki
Maciej Korecki
Vice President of Business of the Vacuum Furnace Segment
SECO/WARWICK
(Source: SECO/WARWICK)

The Vector also contains a metal heating chamber, which prevents direct heat loss to the vacuum chamber’s wall and ensures high process purity. The efficiency is also influenced by the ability to conduct the heating and cooling process at 6 bars with two gases (nitrogen or argon).

Maciej Korecki, vice president of the Vacuum Segment at the SECO/WARWICK Group, states, “This is our first order from a Siemens Energy production facility, but in the past, we have supplied equipment to gas turbine manufacturers."

Commenting on the future of clean energy for the power industry, Korecki further notes, "Gas turbines can run on a variety of gases, including hydrogen. Green hydrogen, as an energy carrier without a carbon footprint, will gradually increase its market share not only in the energy industry, but also in other economic sectors, contributing to gradual decarbonization of the atmosphere."

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Tips for a Healthy Vacuum Furnace System

Source: Ipsen, the Harold blog

Vacuum Furnace (source: Ipsen, the Harold)

A strong and healthy vacuum furnace system is essential for heat treaters who want to stay competitive and serve their customers well. The heart of the vacuum furnace system is just as critical as the heart of the human body. Just as a healthy heart is essential to living well, keeping a healthy vacuum furnace system pumping strong is essential to certain heat treating operations.

In this Heat Treat Today Technical Tuesday Best of the Web feature, Ipsen USA provides tips for how you can get the best performance out of your vacuum furnace by selecting the most appropriate pumping system, and by following a few simple tips for vacuum furnace maintenance over at its blog, Ipsen, The Harold.

An excerpt: Vacuum furnace systems utilize various types of pumping system combinations to evacuate atmospheric pressure from the vacuum chamber to required ranges for specific processes. Since the heart of the furnace is the vacuum system, it is essential to maintain the pumping system as specified in the operator’s manual, taking into consideration any special accommodations that the type of process being conducted may require.

This post from Ipsen’s blog guides readers through the basics, troubleshoots common problems, and gives tips for avoiding the heat treater’s primary enemy.

Read more: “Tips to keep your vacuum furnace system healthy and pumping strong”

(source: Ipsen, the Harold)

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The Heart of a Vacuum Furnace System

 

Source: VAC AERO International

 

Heat treaters know that the heart of a vacuum furnace system is the pumping system. As broad as the variety of furnaces is, so is the selection of pump types.

A roots blower, which also goes by the name “booster pump” and “intermediate stage vacuum pump,” is a dry, gas transfer pump that boosts the performance of the primary pump, providing an increase in pumping speed and pressure. This article from VAC AERO International’s Vacuum Pump Technology: Education and Training page provides an exhaustive analysis of the heart of a vacuum furnace system: the pump.

“Roots blowers have the reputation of being virtually indestructible and run for years seemingly unattended while the primary (mechanical) and high vacuum (diffusion pumps seem to receive all the attention. While they need little day-to-day maintenance, monitoring of the oil level in the pump is required. The main function of these booster pumps is to improve pump-down rates and ultimate vacuum levels.” ~ VAC AERO International

Read more: “Roots Blowers (aka Booster Pumps)”

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Selecting the Right Vacuum Pump Oil Starts with Knowing Your Pump

 

 

Source: VAC AERO International

 

Vacuum furnace heat treaters know that one of the most critical parts of their system is the pump oil, but it may be a bit overwhelming trying to determine which is the right kind of oil is needed. Selecting the correct vacuum pump oil starts with knowing your pump.

“‘Oil’ is a bit of a misnomer because modern pump oil technology has evolved well beyond the original distilled petroleum products. There are now double- and triple-distilled oils available, as well as hydro-treated oils, low sulfur oils, silicone-based synthetic oils, and flushing oils used to clean the pump. Due to the wide variety of formulations available, these are often now referred to as pump ‘fluids’ rather than pump ‘oils’.” — VAC AERO International

“Different pump oil formulations are specifically designed for different pumps and different vacuum applications,” notes VAC AERO, and a key factor in learning how to select the correct pump oil is the understanding of vapor pressure, viscosity, and distillation methods, as well as solvent refining, hydrotreating, synthetic oil (Perfluoropolyether), flushing oil for vacuum pumps, and diffusion pump oils.

 

 

Figure 1 | Viscosities of various liquids

 

Read more: “Vacuum Pump Oil”

 

 

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