EVP Vacuum Roots, Dry Screw, Liquid Ring and Molecular Pumps

Selection and quotation of EVP vacuum equipment: ER and ERP Roots pumps, EDSE and EDSV dry screw pumps, ZB claw pumps, 2BV and 2BE4 liquid ring pumps, LRC compressors, rotary vane, rotary piston, molecular and cryogenic pumps, and pump sets.

ER, ERP and ERP(AC) Roots Vacuum Pumps

Mechanical booster Roots pumps run only with a backing pump: two figure-8 rotors turn in sync without touching the pump chamber. The ERP series covers 70 to 2500 L/s at 3000 rpm with 0.05 Pa ultimate pressure. ERP(AC) pumps are air-cooled and need no cooling water.

ERP pumping speed: 70-2500 L/s
Ultimate pressure: 0.05 Pa
ER rotary speed: 2860-3000 rpm
ERP motor power: 1.1-22 kW

EDSE and EDSV Dry Screw Vacuum Pumps

Oil-free screw pumps handle condensable vapors and gas with some solids, leaving no residue in the chamber. EDSE and EDSV models deliver 180 to 1260 m³/h at 2900/3550 rpm (50/60 Hz) with 7.5-30 kW motors. B-EDSE and B-EDSV versions serve chemicals, pharma, solvent recovery and coating.

Pumping speed: 180-1260 m³/h
Ultimate pressure: 0.02 mbar
Rotary speed: 2900/3550 rpm
Motor power: 7.5-30 kW

ZB PHC Claw Dry Vacuum Pumps

Claw pumps keep oil out of the compression chamber; the spiral anti-claw rotors are made of 17-4PH stainless steel. They are built for chemical, petrochemical and pharmaceutical duty with 30-200 L/s and 3-200 Pa ultimate pressure. A Hastelloy anticorrosive version is available.

Pumping speed: 30-200 L/s
Ultimate pressure: 3-200 Pa
ZB 30-150PHC speed: 2900 rpm
ZB motor power: 4-22 kW

2BV and 2BE4 Liquid Ring Vacuum Pumps

Close-coupled 2BV pumps from 27 to 500 m³/h reach 33 mbar, have a cavitation protection port and SS304 or SS316L wetted parts; 2BV6 models are explosion-proof. Large 2BE4 pumps handle 2000 to 32,300 m³/h at 160-1013 mbar with V-belt or gearbox drive.

2BV capacity: 27-500 m³/h
2BE4 capacity: 2000-32,300 m³/h
2BV speed: 970-2880 rpm
2BV6 explosion protection: DIIBT4/DIICT4

LRC Liquid Ring Compressors

A single-stage LRC impeller raises pressure up to 0.7 MPa(g) at 90 to 2400 m³/h. The bearing chamber runs on thin oil, the rear locating bearing sets the clearance, and a double mechanical seal closes the shaft. The compressors serve petrochemical plants.

Discharge pressure: up to 0.7 MPa(g)
Capacity: 90-2400 m³/h
Rotary speed: 1450/2900 rpm
LRC motor power: 55-400 kW

ESV and EDV Rotary Vane Vacuum Pumps

Oil-sealed ESV pumps deliver 8 to 750 m³/h at 8-200 Pa: small models run at 2800-2880 rpm, ESV-040 to ESV-300 at 1440 rpm and ESV-750 at 1000 rpm. Two-stage EDV pumps with direct drive and gas ballast reach 0.5 Pa.

ESV capacity: 8-750 m³/h
EDV ultimate pressure: 0.5 Pa
ESV-040 to 300 speed: 1440 rpm
EDV motor power: 0.4-7.5 kW

EDP and ESP Rotary Piston Vacuum Pumps

Oil-sealed rotary piston pumps handle gas with a small share of condensable vapor when the gas ballast is open. Two-stage EDP pumps give 15-160 L/s and 0.06 Pa; single-stage ESP pumps give 70-600 L/s and 1 Pa. F versions have a larger oil tank for dust and water vapor.

EDP pumping speed: 15-160 L/s
ESP ultimate pressure: 1 Pa
ESP-600F motor power: 55 kW
ESP-600F oil volume: 140 kg

EMP Molecular, ECP Cryogenic and EOD Diffusion Pumps

EMP molecular pumps from 80 to 4500 L/s give clean ultra-high vacuum without a cold trap or oil baffle; the rotor turns at 21,000-60,000 rpm on magnetic or grease-lubricated ceramic bearings. ECP cryopumps reach 1×10⁻⁷ Pa and EOD diffusion pumps deliver 1750-9000 L/s.

EMP pumping speed: 80-4500 L/s
EMP rotary speed: 21,000-60,000 rpm
ECP ultimate vacuum: 1×10⁻⁷ Pa
EOD diffusion pumps: 1750-9000 L/s

Choosing a Pump by Pressure and Process Gas

2BV liquid ring pumps, 27-500 m³/h down to 33 mbar, serve black liquor evaporation and dewatering in pulp and paper, vapor collection in chemicals and condenser exhausting in power plants; large 2BE4 pumps give 2000-32,300 m³/h. Where oil must stay out of the process gas, EDSE and EDSV dry screw pumps, 180-1260 m³/h with 0.02 mbar ultimate pressure, or ZB claw pumps, 30-200 L/s, are used.

Oil-sealed ESV rotary vane pumps give 8-750 m³/h at 8-200 Pa and two-stage EDV pumps reach 0.5 Pa; EDP rotary piston pumps serve vacuum furnaces, smelting and sintering.

Roots Booster Sets

A Roots pump sits on a backing pump to raise pumping speed in medium vacuum. ERP pumps give 70-2500 L/s and 0.05 Pa; ERP(AC) pumps are air-cooled for sites without cooling water.

Ready sets: JZJ(P)LG pairs a ZJ(P) Roots pump with an LG dry screw pump, from 150 L/s and 0.5 Pa for JZJ(P)LG150-3 to 1200 L/s for JZJ(P)LG1200; JZPX pairs a ZJP Roots pump with a 2X two-stage rotary vane pump, from 70 L/s for JZPX70-4. ZJ pumps have no bypass valve, ZJP pumps have one.

Gas Compression: LRC Compressors

LRC liquid ring compressors with a single-stage impeller raise pressure up to 0.7 MPa(g) at 90-2400 m³/h, with 55-400 kW motors running at 2900 rpm on smaller models and 1450 rpm on larger ones.

The bearing chamber runs on thin oil, the rear locating bearing sets the clearance and a double mechanical seal closes the shaft. The compressors serve petrochemical plants.

High and Ultra-High Vacuum

EMP molecular pumps, 80-4500 L/s, give clean ultra-high vacuum without a cold trap or oil baffle; the rotor turns at 21,000-60,000 rpm on magnetic or ceramic bearings. ECP cryopumps ship as a set with a compressor, temperature controller and 3 m helium line and reach 1×10⁻⁷ Pa.

EOD diffusion pumps deliver 1750-9000 L/s down to 5×10⁻⁵ Pa.

EVP Vacuum and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of EVP Vacuum and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.