cmd, cdx, ced series - fluid .cmd series the cmd series are level actuated, pneumatically operated,

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    CMD, CDX, CED SeriesDrains


  • Drain TechnologiesCompAir utilizes the latest in drain technology to meet all of your system needs. Although CompAir offers a variety of drains, there are three major drain technologies, Pneumatic, Electronic Demand and Timed Electric, in the product offerings.


    Pneumatic drains are a great option because they permit installation anywhere without concerns for electrical safety issues. Pneumatic drains are powered by air, not electricity, so they are ideally suited for remote or portable applications. They are also safe to operate in any hazardous area. Drains offered by CompAir are also zero-loss, meaning no compressed air is lost during the drain process. This results in energy savings.

    Electronic Demand

    Electronic Demand drains offer a great amount of installation flexibility and will reduce the amount of energy consumed. They operate based on the level of demand, not on a specific time setting that does not take demand into consideration. When the level of condensate in the reservoir rises to its maximum level, a capacitive sensor activates and the system of discharging the condensate begins. CompAir's zero-air-loss electronic demand drains ensure reliable condensate removal and that costly compressed air is never lost.

    Timed Electric

    Timed Electric drains operate by utilizing two timed settings that a user can program according to their application and drain needs. The drains have one timer that is set for the interval between each time the drain opens. The second timer is set for the amount of time that the drain is open. During the draining process there will be a minimal amount of air lost.

    Where Are Drains Used?CompAir condensate drains ensure manufacturing process and finished product are not contaminated by bulk liquids and oil. Proper drain installation is a critical component in a well designed CompAir air treatment system.

    1. Separators used downstream of after-coolers remove large amounts of condensate from the compressed air stream. They are normally integrated into a compressor package or are placed directly at the compressor outlet. These separators are designed to effectively remove high volumes of liquid contamination.

    2. Receiver tanks utilize drains installed beneath the tank.

    3. Filters utilize drains to dispose of liquid oil and water which has been separated from the air stream by the coalescing filter element.


    CDX Electronic Demand Drain

  • Using Drains Saves You MoneyInstalling automatic condensate drains has several benefits for every compressed air system

    Eliminates daily man-hours required to walk the factory and manually drain air lines and equipment

    Eliminates daily man-hours required every morning to purge the air lines of condensate before work begins

    Prevents the receiver tank from filling up with condensate and causing the compressor to short cycle.

    Zero loss drains save on wasted compressed air created when valves are cracked open to purge the air lines of condensate

    Ensures timely and effective condensate removal during working hours to protect end products and processes from contamination


    ISO 8573.1Air Quality Class System P*


    Solids Moisture Oil psi bar

    3 6 5

  • CMD SeriesThe CMD Series are level actuated, pneumatically operated, zero-loss, automatic condensate liquid drain devices for use in discharging collected liquid from a compressed air system. It is recommended that the CMD Series drains are used with air receivers, drip legs, aftercoolers, separators, dryers, and filters.

    Features & Benefits Operating temperatures: 35150F

    Operating pressures: 10500 PSIG

    Models offered with top or bottom inlet connection

    Economical drain for light to heavy duty service

    Discharge rates of 0.324 gallons/hour

    Discharge port designed to prevent clogging

    OperationSee Figure 1

    1. Float held in place by a magnet.

    See Figure 2

    2. Condensate rises. Buoyancy of float overcomes magnetic force.

    3. Float arm rises. Pilot valve opens.

    4. Compressed air enters cylinder. Piston moves up. Discharge port opens.

    5. Condensate level falls. Pilot valve closes. Back pressure bleeds off.

    6. Air pressure moves piston down. Discharge port closes.

    Pneumatic Drains

    Figure 1

    Figure 2


    Pilot Valve

    Discharge Port

    Condensate Rises

    Float Arm


    Pilot Valve





  • CMD Specifications

    Series Type Model Pressure Kgf/cm2 Capacity* Materials


    Top Connection CMD12T 250 1.4/12.30.3 gals/h,

    1.2 l/h

    Bowl: Epoxy coated zinc housing c/w sight glass;

    Internals: Delrin mechanical parts: Viton Seals impervious to synthetic lubricants

    Bottom Connection CMD12B 250 1.4/12.3


    Top Connection CMD13T 300 21

    3 gal/h, 11.4 l/h

    Carbon steel housing; Stainless steel, brass, delrin, nylon,

    mechanical parts; Viton seals

    *Drains are designated to operate at one discharge per minute for one year before

    rebuilding is required. Maximum capacity is six discharges per minute.

    Top Connection High Pressure CMD113TH 500 35

    Top Connection Stainless Steel CMD113TS 300 21

    Top Connection High Pressure Stainless Steel

    CMD113THS 500 35

    Bottom Connection CMD13B 300 21

    Bottom Connection High Pressure CMD13BH 500 35

    Bottom Connection Stainless Steel CMD13BS 300 21

    Bottom Connection High Pressure Stainless Steel

    CMD13BHS 500 35


    Top Connection CMD15T 300 21

    24 gal/h, 90.8 l/h

    Carbon steel housing; Stainless steel, brass, delrin, nylon,

    mechanical parts; Viton seals

    (1) Drains are designated to operate at one discharge per minute for one year before

    rebuilding is required. Maximum capacity is six discharges per minute.

    Top Connection High Pressure CMD15TH 500 35

    Top ConnectionStainless Steel CMD15TS 300 21

    Top Connection High PressureStainless Steel

    CMD15THS 500 35

    Bottom Connection High Pressure CMD15B 300 21

    Bottom Connection Stainless Steel CMD15BH 500 35

    Bottom Connection Stainless Steel CMD15BS 300 21

    Bottom Connection High Pressure Stainless Steel

    CMD15BHS 500 35


    CMD12 bottom connectionCMD12

    top connection

  • CDX SpecificationsModel CDX1 CDX3 CDX10 CDX30 CDX100

    Compressor Capacity (cfm) 141194 423583 1,4131,942 4,2385,827 14,12517,657

    Refrigerated Dryer (cfm)* 282388 8471,165 2,8254,061 8,47511,654 38,25140,611

    Filter-downstream (cfm)** 1,4131,942 4,2385,827 14,12517,657 42,37260,035 42,37260,035

    Min./Max. Operating Pressure (psig) 11.6 / 232 11.6 / 232 11.6 / 232 11.6 / 232 11.6 / 232

    Min./Max. Operating Temperature (F) 33.8 / 176 33.8 / 176 33.8 / 176 33.8 / 176 33.8 / 176

    Voltage (V) 90250 90250 90250 90250 90250

    Frequency (Hz) 5060 5060 5060 5060 5060

    Condensate oil-contaminated + oil free

    Housing Aluminum, hard-coated

    Condensate Inlet Connection (NPT) 2 x " 2 x " 3 x " 3 x " 1 x 1" + 2 x "

    Condensate Outlet Connection (NPT) " " " " "

    Weight (lbs.) 2.43 3.2 4.63 5.3 9

    * Referred to 100 psig (a) and 68F at 100 psig working pressure, compressor inlet 77F at 60% r.H. compressor discharge temperature 95F, dew point dryer 37F** Condensate aftercooler or refrigerated dryer already removedCapacity depends on different climate zonesOptions on request; Technical Alterations Reserved

    Electronic Demand Drains

    CDX SeriesThe CDX Series are automatic, zero air loss electronic demand drains that offer the highest safety and efficiency in removing liquid condensate. The capacitive sensor monitors the level of condensate and manages if effective discharge. The CDX Series is an integral part of every modern compressed air installation.

    Features & Benefits Maximum operating pressure: 232 PSIG

    Maximum operating temperature: 176F

    Removes liquid based on demand

    Zero air loss

    Resistant against all standard compressor oil types

    Low maintenance/service work

    Alarm in case of malfunction

    Easy installation in both new and existing systems

    Built-in strainer prevents valve blockage and damage


  • CED Specifications

    Model* Maximum

    Working Pressure Voltage Valve TypeOrifice Size Conn.

    Dimensionsin (mm) Weight

    psig (kgf/cm2) in (mm) NPT H W D lb (Kg)

    CED21 175 (12.3) 115/1/60or


    Direct Acting .625 (16) " 5.13 (130) 2.25 (57) 7.88 (200) 3 (1)

    CED22 175 (12.3) Direct Acting .625 (16) /8" 5.13 (130) 2.25 (57) 7.88 (200) 4 (2)

    CED23 175 (12.3)


    23060/20050NEMA 4/4x

    Internal Pilot Operated


    .625 (16) " 5.13 (130) 2.25 (57) 7.88 (200) 4 (2)

    CED30 200 (14) .625 (16) " 5.13 (130) 2.25 (57) 7.88 (200) 4 (2)

    CED32 300 (21) Direct Acting .625 (16) " 5.56 (141) 2.25 (57) 7.88 (200) 3 (1)

    CED41 1500 (105) External Pilot Operated


    .047 (1.20) " 4.38 (111) 1.69 (43) 4.88 (124) 2 (1)

    CED50 300 (21) .50 (13) " 5.31 (135) 2.00 (51) 5.00 (127) 2 (1)

    CED52 300 (21) .50 (13) " 6.25 (159) 2.00 (51) 7.00 (178) 3 (1)

    * Maximum Operating Temperature is 120F (49C)

    Liquid Discharge Per Operation

    Discharge Time in


    Line Pressure when Discharging to Atmosphere Gallons/Liters

    50 psig

    3.5 kgf/cm2

    100 psig

    7 kgf/cm2

    150 psig

    10.6 kgf/cm2

    200 psig

    14 kgf/cm2

    250 psig

    17.6 kgf/cm2


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