WELCH vacuum (a member of the Gardner Denver group) is a manufacturer of high quality, durable vacuum technology. Welch (formerly Ilmvac) is an association of two prominent names in vacuum technology: Welch and Ilmvac. The company supplies innovative vacuum pumps to laboratories, industrial manufacturers and educational institutions worldwide. The company provides solutions for a range of vacuum applications in chemical and biological laboratories. We supply and service these vacuum solutions: Standard MP diaphragm vacuum pumps These are highly durable, dry-running pumps operating on the principle of diaphragms. The pumps achieve ultimate vacuum values from 75 to 1 mbar and maximum flow rates of up to 138 l/min. The pumps are sealed and allow for uncontaminated pumping of gases absolutely free of oil. Characterized by their compact design, long life and oil-free design, these chemically resistant diaphragm pumps are designed for chemical, wet and standard applications. Thanks to its light weight and compact design, users can easily move and use the pumps. MP pumps are available in single-stage or multi-stage design. The pumps can also have their own Ecoflex control. The key parameters of the MP series diaphragm vacuum pumps include: precisely controlled vacuum with automatic operation precise processes with distillation, drying, etc. low noise level long service intervals and long service life optimal condensation due to a constant vacuum all MP series models are equipped with a muffler silencer Applications and examples of the use of the MP series diaphragm vacuum pumps: physical applications industrial applications vacuum filtration degassing processes reverse pump for turbomolecular vacuum pumps gas sampling vacuum furnaces and ovens handling technology Lists of the MP diaphragm vacuum pump models can be found here Chemically resistant diaphragm vacuum pumps (MPC) The diaphragms and parts of the pump that are in contact with the medium are made of PTFE and have a PTFE coating, which allows for pumping of aggressive solvents and acid vapors. The vacuum pump and connection heads are reinforced with carbon fibers to provide electrical conductivity and to prevent electrostatic charging. These diaphragm pumps allow for working with ATEX explosive gases in zone 1 or 2. Pumps designed for explosive environments are equipped with inspection certificates and they meet the requirements relevant to the ATEX regulations. The pumps are available in single-stage or multi-stage configurations. Integrated Ecoflex control is also available. The key parameters of the MPC chemically resistant vacuum pumps include: high chemical resistance possibility of working with explosive gases - ATEX long service intervals and long service life small and compact design PC control of the pump (optional) MPC 201 models are equipped with a bass ballast valve Examples of the use of chemically resistant diaphragm vacuum pumps of the MPC series: transport of corrosive gases rotary evaporation vacuum furnaces industrial applications vacuum distillation vacuum filtration drying of gels gas sampling freeze drying degassing For model lists of chemically resistant diaphragm vacuum pumps of the MPC series Laboratory vacuum systems (LVS) LVS systems are designed for solvent distillation/evaporation. They include an oil-free, chemically resistant diaphragm pump (MPC) with optional accessories: control, liquid condenser and exhaust gas condenser. All parts are made of high quality chemically resistant materials with clear plastic coating. LVS systems are available with or without a control unit. The vacuum can be precisely adapted to individual needs, resulting in a process that runs more efficiently and that is reproducible. Key parameters of the LVS laboratory vacuum systems include: max. flow rate of 20 to 238 l/min. intelligent control and short procedural times modular design with the possibility of amending your processes resistance to acids and solvents parts in contact with the medium are of a PTFE, PVDF, PEEK, PP and glass design dry suction allows for a cleaner working space and environment simple vacuum source Examples of the use of the LVS laboratory systems: rotary evaporation vacuum furnaces industrial applications vacuum distillation packaging industry vacuum nets (Net vac) standard laboratory applications laser technologies environmental technologies vacuum concentrators Lists of the laboratory system models of the LVS series can be found here WELCH two-stage diaphragm oil vacuum pumps The two-stage rotary diaphragm pumps WELCH P-Z and CRVpro achieve maximum pressure levels of 0.5 mbar to 1x10-4 mbar with a pumping speed range between 1.8 m³/h and 60 m³/h. Key parameters of the two-stage oil diaphragm pumps P-Z and CRVpro: Pumping speed: from 1.8 m³/h and 60 m³/h Max. vacuum: 1x10-4 mbar Use of oil diaphragm vacuum pumps CRVpro and P-Z in real life: In the heating and air conditioning (HVAC) segment, the VELCH pumps are used for the freeze drying process (Lyophilization). The pumps are used for chemically demanding applications where conventional two-stage pumps are not sufficient. Rotary oil vacuum pumps of the P-Z and CRVpro series are used in metallurgy, where they are applied in vacuum furnaces as a vacuum source for vacuum processes. In the food processing industry, WELCH pumps can be used for extracting pressure from drying chambers in freeze drying systems. However, they can also be used as support pumps in high vacuum systems. Model lists of the WELCH oil diaphragm vacuum pumps can be found here CDK compact turbomolecular pumping systems Complete units ready for high vacuum generation with extremely high pumping speeds in the front vacuum area. The systems feature a compact design and user-friendly vacuum system controls. Key parameters of CDK turbomolecular pump systems: Pump life of up to 10,000 operation hours Noise level is significantly reduced thanks to a noise cover The operating cost for energy consumption is reduced, which is particularly noticeable when using several CDK turbomolecular vacuum pumps. Use of CDK compact pumping systems in real life: molecular distillation molecular sublimation CCD cameras spraying systems mass spectrometers electron microscopes cryogenic technology research and development Lists of the CDK turbomolecular pump system models can be found here ChemStar® oil-free vacuum systems for chemical applications Combination of two technologies: Roots blowers and diaphragm vacuum pumps. The result is an oil-free, software-controlled vacuum system that is ready to operate even under aggressive chemical conditions - cleanly, quickly and thoroughly. The systems are developed specifically for laboratory operations that require high pumping speeds and high vacuum. The systems combine a booster pump with patented PTFE diaphragm technology that has a pumping rate (150 l/min) in the working range for most evaporation operations (2.0 to 0.1 mbar) and reaches a maximum pressure of 10-2 mbar. Key features of chemically resistant vacuum systems: Max. pumping speed at 50 Hz in m³/h (l/min) 8.4 (140) Max. pumping speed at 60 Hz in m³/h (l/min) 10.1 (168) Final pressure in mbar (Torr) without load: 7x10-2 no oil backflow no oil change or disposal cleaner working environment and cleaner samples less maintenance Use of chemically resistant vacuum systems in real life: The system is usually a vacuum source for laboratory vacuum sets (Schlenk Line). Vacuum is used here to remove the last traces of solvents from the samples. The system can be used for freeze drying (lyophilization) of samples using a deep vacuum. ChemStar® is also suitable for vacuum furnaces. Here it extracts the discharged vapors and contaminated water vapors. The ChemStar® Dry vacuum system creates the necessary atmosphere in laboratory vacuum boxes (Lab glow box). More information about the Chemstar® oil-free vacuum system Mobile turbomolecular pumping systems STP These mobile units are designed to generate high vacuum with extremely high pumping speeds in the front vacuum area. The mobility of the system allows it to be placed as close to the boxes as possible, which means that only short vacuum lines are needed. A short vacuum line guarantees low flow losses and consequently high pumping speeds from the vessel. Key characteristics of the WELCH STP series mobile turbomolecular systems: Pumping speed of the turbomolecular vacuum pump : 250 l/s. Pumping speed of the diaphragm vacuum pump: 4.5 m 3 /h. set mobility system lifetime of up to 10,000 operation hours thanks to the diaphragm vacuum pump. mobile motherboard short pipe connection parts no residual hydrocarbons (STP/D version) energy-saving equipment Model lists of the mobile turbomolecular systems of the STP series Mobile diffusion oil vacuum pumps and DP systems Oil diffusion vacuum pumps are used to produce high and ultra-high vacuum. They can reach a limit pressure of up to 5x10-7 mbar with extremely high pumping speeds. In addition to individual vacuum pumps, we also offer complete vacuum systems with oil diffusion vacuum pumps. To use a diffusion vacuum pump, a vacuum pre-pump must be connected. Diffusion vacuum pumps operate without rotating parts. To achieve a high vacuum range (maximum pressure of 5x10-7 mbar), they use an oil shower. The absence parts that are subject to wear and tear results in diffusion vacuum pumps having a long service life. The vacuum pump achieves pumping speeds of (up to 210 l/s). All oil diffusion vacuum pumps are complete, including a high vacuum valve, fittings, reverse valve and rough vacuum extraction valve. Key characteristics of the DP series of the mobile diffusion oil vacuum pumps and systems: extremely high pumping speed of up to 210 l/s low consumption of cooling water no moving mechanical parts noise-free and vibrations-free operation manual valve control (for the PDM type) / electro-pneumatic valve control (for the PDP type) More information about the WELCH of the diffusion vacuum pumps VAKUUM BOHEMIA, s.r.o. services: Delivery of the vacuum systems WELCH vacuum Sale of diaphragm vacuum pumps and systems Service of diaphragm vacuum pumps WELCH vacuum Repairs and refurbishing of the vacuum equipment Rental of vacuum pumps and vacuum equipmant Spare parts and accessories for WELCH vacuum technologies Support for servicing WELCH vacuum technologies: Team of experienced service technicians Team of engineers for designing vacuum systems and vacuum pumps Spare parts service warehouse Storage of accessories and other parts Testing and measuring equipment for vacuum pumps in the area of fine vacuum Industrial washing tools for environmentally friendly cleaning of vacuum pumps Service, repairs and parts for WELCH technologies: We service WELCH vacuum technologies We refurbish WELCH vacuum technologies We provide service at the customer's site Repairs at the service center WELCH vacuum solutions portfolio: Chemically resistant diaphragm vacuum pumps - PTFE ChemStar Dry vacuum systems Two-stage CRV vacuum pumps Laboratory vacuum systems Table of models - Standard MP diaphragm vacuum pumps Table of models - MPC chemically resistant diaphragm vacuum pumps Table of models - LVS laboratory vacuum systems Table of models - WELCH two-stage diaphragm oil vacuum pumps Table of models - CDK compact turbomolecular pumping systems Table of models - ChemStar® oil-free vacuum systems for chemical applications Table of models - Mobile turbomolecular pumping systems STP Table of models - Mobile diffusion oil vacuum pumps and DP systems VAKUUM BOHEMIA s.r.o.