Thank you for writing to us. One of our executive will reach back to you through your submitted medium. In case there’s an urgency, feel free to connect over WhatsApp for faster response.
Prefer calling? Dial +9108048046662 (International callers) or 08048046662 (Indian callers).
Vacuum Chamber are Precise instruments for experimentation, powerful tools for productivity
DHVE Vacuum Chambers provide the foundation for a broad range of systems, serving uses from scientific experimentation to industrial production. DHVE ’s vertically integrated engineering sales, design and fabrication method positions the company to respond to stock order and custom fabrication requirements promptly and cost effectively.
Component and Package leak testing, degassing, vacuum process methods, altitude flight and deep space simulations; DHVE Vacuum Chambers serve as powerful and well crafted tools in countless sciences and industries.
For more info visit us at
www.vaccumpumpmanufacturer.com
Freeze-drying or lyophilization
Freeze-drying, or lyophilization, is the process of freezing a material then sublimating any frozen liquid directly from solid to gas. The method is often used to preserve food and pharmaceuticals, as it allows products to be easily stored and transported without requiring constant refrigeration.
Vacuum pumps are required for this process, and should be sized according to the freeze-dryer. If the pump’s flow rate is too high, then vapor will be pulled through the freeze-dryer’s condenser too quickly, reducing its efficiency. It is also important to clean the condenser after each run to prevent sublimation of frozen chemicals into the vacuum pump. Freeze-dryer applications require an ultimate vacuum of 10-1 to 10-3 mbar, which can be achieved with single- and two-stage rotary vane pumps or ChemStar Dry Lyophilizer
Fully customizable and low-cost, our hydroformed metal bellows are ideal for a broad spectrum of applications including industrial and aerospace.
Cost competitive, medium to high volume applications
Multiple metal selections: brass, bronze, stainless steel, monel, and beryllium copper
Turbomolecular pump system Technical Data
More Information
Article Number 101351
Pumping speed N2 - Nitrogen in l/s 67
Ultimate pressure in mbar (Torr) 5x10-7
Wired for 230V, 50/60Hz
Intake connection DN 63 ISO-K
Exhaust connection DN 16 KF
Dimensions (W/D/H) in mm 480/500/700
Weight kg (lbs) 20 (44)
A High Vacuum Pumping system consists of Rotary Pump, Booster pump and oil diffusion pump is made ready for shipment to reputed client for cryogenic vessel evacuation.The system is tested upto a vacuum level of 5X10(-6) mbar. Another achievement of Alfatechnovac Team
In today's high-stakes manufacturing and processing environments, achieving a truly oil-free, high-efficiency vacuum is non-negotiable. Traditional pumps often introduce the risk of contamination, high maintenance burdens, and poor energy performance.
Dinesh High Vacuum Engineering (DHVE) is proud to present its next-generation line of Dry Screw Vacuum Pumps—the definitive solution for applications demanding purity, precision, and the lowest possible cost of ownership. This detailed guide explores the superior technology, advanced features, and material science that make DHVE dry screw pumps the industry's gold standard.
⚙️ Technical Mastery: The Science Behind DHVE Dry Screw Pumps
A dry screw pump is a masterpiece of precision engineering. Unlike wet pumps, which rely on lubricating fluids, the DHVE dry screw mechanism achieves its vacuum purely through mechanical action in an oil-free environment.
The Core Mechanism: Non-Contact Compression
The heart of the pump consists of two parallel, precision-machined helical screw rotors that rotate in perfect synchronization.
Axial Gas Transport: As the rotors spin in opposite directions, the threads intermesh without making physical contact. This action traps process gas at the inlet and progressively transports it along the axis of the screws toward the exhaust.
Internal Compression (Variable Pitch): DHVE models utilize a variable pitch screw design. This advanced geometry features a decreasing pitch (thread spacing) toward the discharge end. This progressive reduction in volume creates internal compression, which is a crucial feature:
It minimizes the pressure difference between the last compression chamber and the exhaust, significantly reducing backflow leakage (or 'slip losses').
This results in higher volumetric efficiency and lower power consumption compared to constant-pitch designs.
Gap Sealing: The vacuum is maintained by extremely tight, micron-level clearances between the rotors and the casing, and between the rotors themselves. This non-contact principle eliminates wear, ensures process purity, and is the foundation for the pump’s exceptional reliability.
🛡️ Corrosion & Contaminant Handling: Built for Harsh Environments
The dry screw design inherently handles condensable vapors and particulates better than oil-sealed pumps. However, for the aggressive chemical and pharmaceutical sectors, DHVE offers pumps built with specialized material science to ensure longevity and zero failure.
Advanced Materials for Chemical Resistance
For applications involving highly corrosive gases like concentrated acids, solvents, and chlorides, Dinesh High Vacuum Engineering utilizes premium materials and coatings:
Stainless Steel Rotors (316L and Duplex): For mild to moderately corrosive process streams, 316L offers excellent general resistance. For extreme environments, Duplex stainless steel (UNS S32205 / S32750) is utilized, providing superior resistance to pitting, crevice corrosion, and stress cracking, especially against chlorides and organic acids.
Anti-Corrosion Coatings: The internal surfaces of the pump casing and rotors are often protected with thick, robust coatings such as Nickel Plating (ENP) or PEEK (Polyether Ether Ketone).14 These barrier layers prevent direct contact between the metal substrate and the aggressive process media.
Gas Ballast System: Every DHVE dry screw pump is equipped with a gas ballast port. Introducing a small, controlled amount of inert gas (like Nitrogen) heats the pump and lowers the partial pressure of condensable vapors, ensuring they remain in the gaseous state and are safely expelled, preventing liquid condensation and subsequent corrosion.
🌐 Applications & Industrial Purity
The unique combination of oil-free operation, VSD energy efficiency, and chemical resistance makes the DHVE Dry Screw Vacuum Pump the definitive choice across critical industries:
Pharmaceuticals & Lyophilization: Guarantees absolute product purity, essential for drug safety and solvent recovery processes like freeze drying.
Semiconductor & Electronics: Meets the stringent demands for ultra-clean vacuum required in PVD/CVD coating, etching, and load lock chambers.
Chemical Processing: Reliable performance in challenging duties such as vacuum distillation, solvent stripping, and reactor service, backed by our corrosion-resistant material options.
Ready to Optimize Your Vacuum Process?
The decision to invest in a Dry Screw Vacuum Pump is an investment in process reliability, energy efficiency, and product purity. By choosing Dinesh High Vacuum Engineering (DHVE), you gain access to cutting-edge technology, expert application support, and a pumping solution engineered for decades of low-maintenance operation.
➡️ Contact Dinesh High Vacuum Engineering today to speak with one of our vacuum specialists and receive a quote tailored to your exact industrial requirements!
For applications that demand the absolute highest standards of vacuum purity, stability, and speed, the Turbomolecular Pump (TMP) is the undisputed technology of choice. Operating in the high vacuum (HV) and ultra-high vacuum (UHV) regimes (down to $10^{-11} mbar), TMPs are the essential workhorses of the semiconductor, research, and analytical science industries.
Dinesh High Vacuum Engineering (DHVE) delivers state-of-the-art Turbomolecular Pumps, combining high rotational speeds, advanced bearing technologies, and expert engineering to ensure a hydrocarbon-free environment for your most sensitive processes.
I. ⚙️ The Core Principle: Momentum Transfer in Molecular Flow
The Turbomolecular Pump functions as a highly specialized, multi-stage momentum transfer pump. It works on the principle that gas molecules, under the conditions of molecular flow, can be given momentum in a preferred direction by repeated collisions with a fast-moving solid surface.
How the TMP Achieves UHV
Molecular Flow: TMPs are effective only when the system is already at a low enough pressure (typically below $10^{-3} mbar) where the gas is in the molecular flow regime. In this regime, the mean free path of gas molecules is greater than the distance between the pump's internal surfaces. This means molecules collide primarily with the pump surfaces rather than with each other.
Rotor and Stator Blades: The pump consists of multiple alternating stages of rapidly rotating rotor blades and stationary stator blades (or discs) that resemble a jet engine turbine.
Rotor Action: The rotor blades, spinning at extremely high speeds (often 20,000 to 90,000 RPM), 'hit' gas molecules, imparting a downward momentum towards the pump's exhaust. The resulting velocity of the molecule is the sum of its thermal velocity and the rotor's blade velocity.
Stator Action: The fixed stator blades act as baffles, preventing the now-accelerated molecules from moving back toward the inlet while directing them into the next stage of the rotor.
Compression: This repetitive collision process, across many stages, successively compresses the gas until it reaches a high enough pressure to be efficiently removed by a backing pump (fore-vacuum pump), typically a dry screw or rotary vane pump.
II. 💡 Modern Turbopump Design: Hybrid and Wide-Range Models
Modern TMPs often feature a hybrid design to enhance performance across the pump's pressure range:
Turbine Stages (Inlet): These stages, with finely pitched blades, are optimized for maximum pumping speed at very low pressure (molecular flow).
Molecular Drag Stages (Exhaust): Located near the backing pump, these stages (e.g., Holweck or Siegbahn mechanisms) use rotating drums or discs with helical channels to actively drag gas molecules. They are optimized for higher compression ratios at higher pressures, which dramatically improves the pump's ability to handle the light gases (like Hydrogen and Helium) and allows for a smaller, more economical backing pump.
DHVE specializes in Wide-Range TMPs that integrate these drag stages, offering a superior compression ratio, especially for light gases which often leak back through traditional pure turbine designs.
IV. 🌍 Essential Applications for DHVE Turbomolecular Pumps
The superior ultimate vacuum, clean operation, and high pumping speed make TMPs from Dinesh High Vacuum Engineering indispensable in the following critical fields:
Semiconductor Manufacturing: Essential for demanding processes like PVD (Physical Vapor Deposition), CVD (Chemical Vapor Deposition), and ion implantation where even trace hydrocarbon contamination can destroy microchips.
Analytical Instruments: Used in Mass Spectrometry (MS), Gas Chromatography-Mass Spectrometry (GC-MS), and Electron Microscopy (SEM/TEM) to create the ultra-clean vacuum required for particle beam generation and precision analysis.
Research & Development: Critical for high-energy physics accelerators, space simulation chambers, and surface science experiments that necessitate extreme vacuum conditions (UHV).
Coating Industry: Key for achieving high-quality, defect-free optical and thin-film coatings.
Partner with Dinesh High Vacuum Engineering
For over 30 years, Dinesh High Vacuum Engineering (DHVE) has been a trusted manufacturer in the high-vacuum technology space. Our Turbomolecular Pumps are engineered for demanding industrial uptime, minimal vibration, and unparalleled purity, ensuring reliable performance in your most sensitive vacuum processes.
➡️ Contact Dinesh High Vacuum Engineering today to discuss your specific UHV requirements and find the perfect Turbomolecular Pump solution for your application.
Dinesh High Vacuum Engineering (DHVE)
In research laboratories, analytical facilities, and specialized clean manufacturing, the demand for a clean, quiet, and vibration-free vacuum is paramount. The solution lies in the meticulously engineered Dry Scroll Vacuum Pump. Operating completely without oil in the pumping chamber, this technology delivers the reliability and purity required for sensitive processes while maintaining an industry-leading low noise profile.
Dinesh High Vacuum Engineering (DHVE) presents a range of compact, high-performance Dry Scroll Pumps—the ideal fore-vacuum (backing) pump for high vacuum systems and a superb standalone pump for medium vacuum applications.
I. ⚙️ The Scroll Mechanism: Clean Compression in Action
The Dry Scroll Pump is a type of positive displacement pump that utilizes a unique, elegant geometry to trap and compress gas. Its fundamental advantage is the oil-free operation achieved through the precise, non-contact movement of its key components.
The Working Principle: Orbiting and Fixed Scrolls
Fixed and Orbiting Scrolls: The core mechanism consists of two involute spiral-shaped scrolls: one is fixed (stationary) to the pump casing, and the other, the orbiting scroll (movable scroll), is driven by a motor to move in a tight, eccentric orbit.
Gas Trapping and Compression: As the orbiting scroll sweeps through its cycle, it creates crescent-shaped gas pockets between the two scrolls.
Gas enters at the inlet port on the outermost ring of the scrolls.
The orbiting motion traps the gas and transports it progressively toward the center of the spiral assembly.
As the gas moves inward, the volume of the crescent-shaped chambers continuously decreases, leading to compression.
Exhaust: The highly compressed gas is finally discharged through a valve located at the center of the fixed scroll assembly to the atmosphere or a capture system.
The Role of Tip Seals
While the main scroll bodies do not physically touch (maintaining the dry compression volume), the tip seals—often made of high-performance polymer like PTFE—are critical for minimizing gas leakage back towards the inlet, ensuring a deep ultimate vacuum. DHVE selects only high-durability, low-wear materials for its tip seals to maximize pump lifespan and minimize maintenance needs.
II. 🌟 Key Advantages of DHVE Dry Scroll Pumps
The design benefits of the dry scroll pump translate directly into practical operational advantages for high-purity environments:
100% Oil-Free Vacuum: Eliminates the risk of hydrocarbon back-streaming or oil vapor contamination, which is critical for analytical and semiconductor applications.
Ultra-Quiet and Low Vibration: Operating typically at below 55 dB(A) (often lower in standby modes), these pumps are ideal for laboratory benches, cleanrooms, and integrated analytical systems (Mass Spectrometry, Electron Microscopy) where minimal noise and vibration are essential.
Compact and Lightweight Design: Their streamlined structure makes them easy to integrate into complex systems, cabinets, and portable vacuum units.
Excellent Ultimate Vacuum: Capable of consistently achieving vacuum levels down to 10^{-2} to 10^{-3} mbar, making them suitable as a standalone pump for medium vacuum or as the perfect backing pump for Turbomolecular Pumps.
Low Maintenance Requirements: With no oil to monitor or change, maintenance is dramatically simplified, largely limited to periodic tip seal replacement, resulting in higher system uptime.
III. The DHVE Commitment to Clean Vacuum
Dinesh High Vacuum Engineering is committed to providing robust, oil-free vacuum solutions that increase your efficiency and ensure process purity. Our Dry Scroll Pumps are designed for long service life, low energy consumption, and maximum reliability, reducing your total cost of ownership.
➡️ Upgrade your sensitive applications with DHVE's quiet, clean Dry Scroll technology. Contact Dinesh High Vacuum Engineering today for detailed specifications and expert consultation!
For rugged industrial applications requiring dependable performance in the rough to medium vacuum range (typically 10^{-1} to 10^3 mbar), the Piston Vacuum Pump remains a foundational technology. Known for its robust construction, deep vacuum capabilities for its class, and resilience in demanding environments, the reciprocating piston pump is a true industrial workhorse.
Dinesh High Vacuum Engineering (DHVE) offers a comprehensive range of piston vacuum pumps, engineered to deliver high volumetric efficiency and sustained performance across diverse applications, from filtration to material handling.
I. ⚙️ Principle of Operation: Positive Displacement with Precision
The Piston Vacuum Pump belongs to the positive displacement family, utilizing a simple yet highly effective mechanical action to evacuate gases.
The Reciprocating Mechanism
Cylinder and Piston: The core of the pump consists of a cylinder in which a piston moves reciprocally (back and forth). This motion is driven by a crank-connecting rod mechanism linked to an electric motor.
Intake Stroke (Vacuum Creation): As the piston moves away from the cylinder head (retracts), it increases the volume of the chamber. This expansion causes the pressure inside the cylinder to drop significantly below the pressure of the vessel being evacuated. The pressure differential causes the gas to be drawn into the cylinder through the suction (inlet) valve.
Compression Stroke (Exhaust): Once the piston reaches its full retraction point, the suction valve closes, trapping the gas. The piston then moves forward, decreasing the volume and compressing the trapped gas.
Discharge: When the pressure of the compressed gas reaches a point slightly above atmospheric pressure, the discharge (exhaust) valve opens, expelling the gas.
DHVE offers both single-acting (evacuation occurs on one piston stroke) and double-acting (evacuation occurs on both strokes for a steadier flow) piston pump designs to meet specific flow rate and consistency requirements.
II. 🌟 Key Advantages of Piston Vacuum Pumps
The simple and sturdy mechanical design of the Piston Vacuum Pump offers distinct benefits in many industrial settings:
Deep Rough Vacuum Capability: Piston pumps excel at achieving strong vacuum levels in the rough to medium range, often reaching $10^{-1} Pa (10^{-3} mbar) in multi-stage designs, making them highly efficient for batch processes.
Rugged Durability: Constructed from durable materials like cast iron and specialized alloys, these pumps are built to withstand continuous, heavy-duty operation and maintain performance even in harsh, dusty, or humid industrial environments.
High Volumetric Efficiency: Due to their robust seals and positive displacement nature, they maintain high pumping speeds across a wide range of operating pressures.
Ease of Service: With a relatively simple and accessible mechanical layout, piston pumps are generally easy to maintain and service, leading to reduced downtime and lower long-term repair costs.
III. DHVE Focus: Oil-Lubricated vs. Oil-Free Piston Pumps
Piston pump technology comes in two main variants, each suited for different priorities:
Oil-Lubricated Piston Pumps (DHVE Industrial Models):
Features: Utilize oil to cool and lubricate the piston, cylinder walls, and valves, while also improving the seal for a deeper ultimate vacuum. They often include a Gas Ballast feature to prevent water vapor condensation.
Ideal For: High-capacity industrial applications where maximum vacuum depth and durability are prioritized over absolute cleanliness (e.g., vacuum impregnation, drying).
Oil-Free Piston Pumps (DHVE Laboratory Models):
Features: Rely on specialized composite piston rings and cylinder materials to operate without oil.
Ideal For: Small-scale, portable, or laboratory applications (e.g., suction, small-chamber evacuation) where the 100% oil-free discharge is critical, despite sacrificing some ultimate vacuum depth compared to lubricated models.
Trust Dinesh High Vacuum Engineering for Industrial Vacuum
When you choose a Piston Vacuum Pump from Dinesh High Vacuum Engineering (DHVE), you are selecting a solution backed by years of expertise in vacuum technology. Our piston pumps are designed for maximum efficiency, long operational life, and minimal need for servicing, offering you the lowest TCO in industrial rough vacuum.
➡️ Contact Dinesh High Vacuum Engineering today to consult with our experts on selecting the optimal Piston Vacuum Pump model and configuration for your heavy-duty industrial vacuum needs!
Liquid Ring Vacuum Pumps
In the chemical, pharmaceutical, power, and food industries, vacuum processes often involve high volumes of condensable vapors, wet gases, or corrosive media. These challenging environments can quickly degrade and destroy traditional dry or oil-sealed pumps. The solution is the exceptionally robust and highly tolerant Liquid Ring Vacuum Pump (LRVP).
Dinesh High Vacuum Engineering (DHVE) specializes in LRVPs, leveraging the unique properties of a rotating liquid seal to create a vacuum while simultaneously condensing vapors and scrubbing particulates. The result is a simple, durable, and highly reliable pump that is a cornerstone of process vacuum technology globally.
I. ⚙️ The Liquid Ring Principle: Sealing with Fluid
The Liquid Ring Vacuum Pump is a type of positive displacement pump that uses an internal sealing liquid (typically water, but often process-compatible solvents or oils) as the compressing element.
The Simple, Robust Mechanism
Eccentric Impeller: The pump features a multi-bladed impeller mounted eccentrically (off-center) within a cylindrical pump casing.
The Liquid Ring: As the impeller rotates, the sealing liquid is thrown outward by centrifugal force, forming a rotating, concentric ring along the inner wall of the casing. This rotating liquid ring is the 'piston' that creates the vacuum.
Gas Trapping and Compression: Because the impeller is mounted eccentrically, the space between the impeller blades and the inner surface of the liquid ring continually changes volume:
Suction: As the impeller rotates away from the casing center, the chambers between the blades and the liquid ring increase in volume, drawing process gas through the inlet port.
Compression: As rotation continues, the liquid ring moves inward toward the impeller hub, reducing the volume of the trapped gas chambers and compressing the gas (isothermal compression).
Discharge: The compressed gas, along with a portion of the sealing liquid, is expelled through the discharge port. An external separator system captures the liquid for cooling and potential recirculation (partial or full recovery systems).
II. 🌟 Superior Advantages of DHVE Liquid Ring Pumps
The unique use of a liquid seal provides a distinct set of operational benefits that make the LRVP essential for difficult industrial duties:
Exceptional Contaminant and Vapor Handling: The ability to handle high liquid carryover, condensable vapors, and even soft solids without damage is the defining advantage. The sealing liquid washes the pump's internals, preventing fouling and corrosion.
Isothermal Compression: The continuous presence of cool sealing liquid absorbs the heat generated during gas compression. This results in an isothermal (constant temperature) process, which is safer for handling heat-sensitive and potentially flammable gases.
Rugged Reliability & Durability: With only one moving part—the impeller—and no metal-to-metal contact between the impeller and the casing, the DHVE LRVP experiences minimal wear. This translates to exceptional operational uptime and significantly lower maintenance costs.
Versatility in Sealing Fluids: The sealing liquid is often chosen to be compatible with the process gas. DHVE can configure systems to use water, mineral oil, or specific organic solvents, allowing the LRVP to be used for gas scrubbing and recovery simultaneously.
Single- and Two-Stage Options: DHVE offers both single-stage pumps (for rough vacuum, down to approx. 35 mbar) and two-stage pumps (for deeper vacuum, typically down to 25 mbar), providing tailored performance for your specific pressure requirements.
III. Designing Your DHVE LRVP System
Selecting the correct LRVP system goes beyond just the pump. Dinesh High Vacuum Engineering provides complete systems that include:
Material Construction: Pumps are available in Cast Iron (CI), Stainless Steel (SS 304/316), and specialized alloys to ensure compatibility with highly corrosive media.
Seal Liquid Management: Choosing between Once-Through (single-pass), Partial Recirculation, or Full Recirculation (Closed-Loop) systems is vital for water conservation, heat dissipation, and environmental compliance. DHVE designs recirculation systems with heat exchangers and liquid separators for maximum efficiency.
Performance Range: Single-stage pumps are ideal for applications near the saturation point of the sealing liquid, while two-stage systems offer better performance at deeper vacuum levels.
Partner with Dinesh High Vacuum Engineering for Industrial Process Vacuum
The Liquid Ring Vacuum Pump is the most reliable choice when facing dirty, wet, or corrosive process streams. Trust Dinesh High Vacuum Engineering (DHVE) to supply an expertly designed system that guarantees longevity, safety, and consistent performance, minimizing your environmental impact and maintenance budget.
➡️ Contact Dinesh High Vacuum Engineering today to configure a high-durability Liquid Ring Vacuum Pump system tailored precisely to your industrial process environment!
Chat with us
Chat with us
