VACUUM PUMP EXHAUST & INLET FILTERS

Our vacuum pump exhaust filter assemblies remove heavy concentrations of extremely fine oil droplets from vacuum pump exhaust to permit pumps to discharge into clean work areas of recycle clean gas to the process.  These filter assemblies utilize one or more replaceable microfiber filter elements to coalesce the oil from the exhaust gas.

At the heart of the vacuum pump exhaust filter assembly is the two stage 50CS grade microfiber element which captures the oil mist droplets within the depth of the element’s wall and coalesces the mist into larger droplets, thus allowing gravity to drain them from the assembly.  Since the coalesced liquid drains from the elements at the same rate that liquid droplets enter the elements, the elements have an unlimited life when coalescing relatively clean liquids, and they operate at their initial retention efficiency even when wet with liquid.

Features:

  • Rugged Construction – Easy To Install
  • Low Cost, Completely Disposable Elements
  • Low Back Pressure, Exceptional Life
  • Available In Aluminum And Stainless Steel
  • Recover Expensive Lubricating Fluids

Applications:

  • Exhaust Directly To Outside Environment
  • Ideal For Packaging Industries
  • Semiconductor Protection
  • Vacuum Pump Process Exhaust Polishing
  • Allows Venting Of Exhaust Directly Into Workplace Environment

 

Our disposable 50CS Grade Microfiber Filter Elements are specifically designed for all vacuum pump exhaust applications.  The filters have an efficiency rating of 99.99% at 0.01 micron and are designed to have an initial dry pressure drop of less than 2 psi when sized correctly.  We recommend changing filter elements when the pressure drop reaches 7 PSIG or the pump manufacturers quoted maximum back pressure, whichever is lower.  Do not under-size a filter assembly, since this will reduce performance and may damage the pump.

Since Headline Microfiber Filter Elements operate at their initial retention efficiency even when wet with oil, the filter elements need to be changed only when the back pressure on the pump reaches an unacceptably high level as a result of build-up of particles in the filter elements.  There usually is a very low particle contamination in vacuum pump exhaust, so filter element life is quite long – one year or more in most applications.

The two stage filter element structure minimizes the possibility of carryover of coalesced oil, and the all-inorganic silica composition is completely resistant to lubricants and virtually any chemical found in vacuum pump exhaust.  The maximum temperature limit for a filter assembly is determined by the seals or plastic materials in the system.

All vacuum pump filters have a drain port at their base to remove any collected oils.  This port may be hard piped to continually drain into a reservoir.

Our vacuum pump exhaust elements are 100% interchangeable and equivalent to the Balston 371H series of vacuum pump filter elements.

Choose the correct assembly:

All Vacuum Pump Exhaust filter assemblies come complete with 50CS grade coalescing filter elements.  Assemblies with multiple elements have an integral stainless steel mesh entrainment separator pad to reduce the possibility of oil carryover.  This pad sits snuggly above the elements at the outlet port.

Three simple rules to choosing the correct Vacuum Pump Exhaust filter:

  1. For non-hazardous and non-corrosive, select our Aluminum Version.
  2. For leak-tight service because of toxic or hazardous gas, or if a corrosion-resistant stainless steel filter housing is required, select our Stainless Steel Version, designated with an “S” in the part number – example 430S-50CS.
  3. Next select the assembly which has a flow capacity equal to or greater than the vacuum pump flow capacity.

 

Aluminum Construction for Non-Hazardous, Non-Corrosive Applications
All Vacuum Pump Exhaust filter assemblies come complete with 50CS grade coalescing filter elements.

TECHNICAL INFORMATION
Aluminum Housing Model420-50CS425-50CS430-50CS433-50CS*
Inlet/Outlet Port Size (NPT)1/2"3/4"1"1 1/2"
Drain Port (FNPT)1/8"1/8"1/4"1/4"
Maximum Temperature (°F)250250250250
Aluminum Maximum Pressure (psig)30303030
Maximum Flow Rate (scfm)392045
Principle Dimensions: (inches)
Body Diameter1.973.503.507.00
Cap Diameter1.973.503.509.45
Overall Length3.646.0211.6117.13
Element Removal Clearance3.153.157.87N/A
Element Code25-64-50CS51-89-50CS51-230-50CS51-230-50CS
Balston Element Code100-12-371H200-16-371H200-35-371H200-35-371H
Number of Elements Required1113
Materials Of Construction: (1)
BodyALALALAL
Element Retainers------AL
Tie Rods------316 SS
Seals--Buna-NBuna-NBuna-N
Gauge------Brass
Mesh Pad------304 SS

Notes:
(1) Material abbreviations: AL = Aluminum, 316 SS = 316 Stainless Steel, 304 SS = 304 Stainless Steel
(*) Models 433 and larger come complete with back pressure gauge and anti-reintrainment mesh pad
.

TECHNICAL INFORMATION
Aluminum Housing Model443-50CS*437-50CS*447-50CS*456-50CS*
Inlet/Outlet Port Size w/ 1/4" FNPT Drain2" NPT3" NPT3" NPT4" Flanged
Maximum Temperature (°F) 250250250250
Aluminum Maximum Pressure (psig)30303030
Maximum Flow Rate (scfm)90100200450
Principle Dimensions: (inches)
Body Diameter7.009.849.8415.98
Cap Diameter9.4912.9912.9919.37
Overall Length28.9420.2730.1635.83
Element Removal ClearanceN/AN/AN/AN/A
Element Code51-476-50CS51-230-50CS51-476-50CS51-476-50CS
Balston Element Code200-80-371H200-35-371H200-80-371H200-80-371H
Number of Elements Required37716
Materials Of Construction: (1)
BodyALALALAL
Element RetainersALALALAL
Tie Rods316 SS316 SS316 SS316 SS
SealsBuna-NBuna-NBuna-NBuna-N
GaugeBrassBrassBrassBrass
Mesh Pad304 SS304 SS304 SS304 SS

.
Notes:
(1) Material abbreviations: AL = Aluminum, 316 SS = 316 Stainless Steel, 304 SS = 304 Stainless Steel
(*) Models 433 and larger come complete with back pressure gauge and anti-reintrainment mesh pad

 

Stainless Steel Construction for Hazardous, Corrosive, and High Temperature Applications
All Vacuum Pump Exhaust filter assemblies come complete with 50CS grade coalescing filter elements.

TECHNICAL INFORMATION
Aluminum Housing Model420S-50CS425S-50CS430S-50CS433S-50CS*
Inlet/Outlet Port Size (NPT)1/2"3/4"1"1 1/2"
Drain Port (FNPT)1/8"1/8"1/4"1/4"
Maximum Temperature (°F)400400400400
Stainless Steel Maximum Pressure (psig)100100100100
Maximum Flow Rate (scfm)392045
Principle Dimensions: (inches)
Body Diameter2.363.503.508.62
Cap Diameter2.363.503.5011.81
Overall Length4.015.6311.6116.88
Element Removal Clearance2.753.549.05N/A
Element Code25-64-50CS51-89-50CS51-230-50CS51-230-50CS
Balston Element Code100-12-371H200-16-371H200-35-371H200-35-371H
Number of Elements Required1113
Materials Of Construction: (1)
Body316 SS316 SS316 SS316 SS
Element Retainers------316 SS
Tie Rods------316 SS
Seals--VitonVitonViton
Gauge------Brass
Mesh Pad------304 SS

.
Notes:
(1) Material abbreviations: 316 SS = 316 Stainless Steel, 304 SS = 304 Stainless Steel
(*) Models 433 and larger come complete with back pressure gauge and anti-reintrainment mesh pad

TECHNICAL INFORMATION
Aluminum Housing Model443S-50CS*437S-50CS*447S-50CS*456S-50CS*
Inlet/Outlet Port Size w/ 1/4" FNPT Drain2" NPT3" NPT3" NPT4" Flanged
Maximum Temperature (°F) 250250250250
Stainless Steel Maximum Pressure (psig)100100100100
Maximum Flow Rate (scfm)90100200450
Principle Dimensions: (inches)
Body Diameter8.6210.7910.7915.98
Cap Diameter11.8114.0514.0519.37
Overall Length28.9419.0231.1040.10
Element Removal ClearanceN/AN/AN/AN/A
Element Code51-476-50CS51-230-50CS51-476-50CS51-476-50CS
Balston Element Code200-80-371H200-35-371H200-80-371H200-80-371H
Number of Elements Required37716
Materials Of Construction: (1)
Body316 SS316 SS316 SS316 SS
Element Retainers316 SS316 SS316 SS316 SS
Tie Rods316 SS316 SS316 SS316 SS
SealsBuna-NBuna-NBuna-NBuna-N
GaugeBrassBrassBrassBrass
Mesh Pad304 SS304 SS304 SS304 SS

.
Notes:
(1) Material abbreviations: 316 SS = 316 Stainless Steel, 304 SS = 304 Stainless Steel
(*) Models 433 and larger come complete with back pressure gauge and anti-reintrainment mesh pad

The IN series of housings is designed to protect small vacuum pumps from liquid and solids in the process stream that may be pulled into the pump. At the heart of the inlet filter is the completely disposable RC-type coalescing element. Made entirely from borosilicate glass fiber and phenolic binder, it is compatible with all compressor lubricants and will operate at temperatures up to 250°F.

The RC-type element has a two-layer structure, inner particle capture-layer and an outer drainage-layer. Liquid droplets remain mobile once captured and travel through the fine-pored capture-layer, along the intersecting microfibers, growing in size as they progress. These coalesced droplets are transferred to the large-pored drainage-layer, where they drain by gravity into the filter bowl. Oil collected in the filter bowl can then be drained and reused. The “RC” reinforced filter element is durable to handle particle build-up. This extra strength provides extra pump protection.

We also offer 4A elements to protect the pump against oil back streaming. Please consult UFS with your specific inlet requirements.

These units are good for service to 2 Torr.

SIZING CHART
Maximum Flow RateLine SizeAnodized AluminumStainless Steel
(scfm)HousingsHousings
31/4" MNPTIN-DIF-LN-RCN/A
31/2" FNPTIN-760NPR-RCIN-420S-RC
7KF 25IN-427-RCN/A
93/4" FNPTIN-425-RCIN-425S-RC
121" FNPTIN-380AHP-RCN/A
201" FNPTIN-430-RCIN-430S-RC
231 1/2" FNPTIN-385AHP-RCIN-150-RC
452" FNPTIN-390AHP-RCIN-162-RC