Unexcelled regulating accuracy due to thermostatic capsule.
With tandem seat (doublesealing) for low condensate flowrates.
For larger condensate flowrates with single seat.

The main feature of the MK traps is an unusally sensitive response.  They are particularly suited for the drainage of such heat exchangers that would appreciably be affected in their operation by even the slightest banking-up of condensate.  The operation of the trap is neither influenced by its position of installation nor by upsteam or back pressure.
The thermostatic capsule and all other internals are made of corrosion-resistant materials.  The membrane of Hastelloy is completely corrosion-resistant even with acid condensate and condensate containing chlorides.
Two different designs of the thermostatic capsule are available:

• standard capsule "N" for instantaneous condensate discharge without any banking-up.  Opening temperature approximately 10 K (degC) below saturation temperature.
• undercooling capsule "U" for additional energy savings (utilization of a certain amount of sensible heat by banking-up of condensate, decreasing the amount of flash steam).  Opening temperature approximately 30 K (degC) below saturation temperature.

The integral non-return valve with hollow cone and reduced mass protects the capsule from waterhammer.
The asbestos-free cover gasket is maintenance-free.
The large-surface strainer protects the trap from dirt ensuring longer maintenance intervals.
For particularly aggressive condensate and special hygienic requirements the MK 35/11 is also available made completely of stainless steel.

MK

For roughest operating conditions.
Unexcelled service life.

Operating principle resulting in a sturdy design unaffected by water-hammer and frost.

Opening and closing are controlled by the temperature sensor of Duo stainless steel plates and the stage nozzle operating together.  During start-up of the plant and in the presence of cold condensate and air the Duo stainless steel plates are flat.  The service pressure acts in the opening direction, the valve is completely open.

With rising condensate temperature the plates deflect and draw the stage nozzle towards the closed position, a thermostatic process.  The service pressure and the pressure built up in the stage-nozzle chamber by flashing produce an opposite force, a thermodynamic process.  The orifice area is determined by the prevailing state of equilibrium between the temperature-dependent closing force and the pressure-related opening force.

Immediately below saturation temperature (boiling temperature) the plates are deflected to such an extent that the stage nozzle is almost closed.  As a consequence the pressure in the stage-nozzle chamber decreases and breaks down as the flashing across the stage nozzle decreases.  The stage nozzle then closes.  The deflection of the Duo stainless steel plates created by the temperature is not sufficient to produce, over the complete pressure range, the force required to counteract the force acting on the stage nozzle in the opening direction.  The plates are therefore arranged in a stack which acts as a spring to the force acting on the stage nozzle varying with the service pressure.  Thermostatic and spring characteristics are balance so that the opening and closing temperatures are always just a few degrees below saturation temperature.

BK

For condensate discharge without banking-up even with load and pressure fluctuations.

Ball float traps are also suitable for the discharge of cold condensates, distillates and condensate derived from chemical products.  They operate without any banking-up even with considerable load and pressure fluctuations and at any back pressure.  Compared with other trap types, they are the least affected by dirt.

The traps are supplied with "Duplex" control (thermostatic bellows for automatic air-venting), alternatively with "Simplex" control (without bellows) and hand vent valve.

The control unit is easily accessible after removing the trap cover, and can be changed as a complete unit without removing the trap from the line.  The rolling ball valve produces very little friction and can be operated with a minimum of force.  This results in small, light traps but with large capacities.

Three different designs of the UNA2... are available:

• UNA 2...h for horizontal pipelines.
• UNA 2...v for vertical pipelines.
• UNA 2...e (angel type) with four possibilities of installation by repositioning of plugs.

The UNA 23 an be supplied with closed cover or with sightglass cover (water-level indicator).

For particularly aggressive fluids or special hygienic requirements the UNA 26 is also available made completely of stainless stee.

UNA

Pressure ratings up to 32 bar (465 psi)
For small condensate flowrates

The closing unit is directly operated by the bucket depending on the condensate level inside the bucket.  the trap ensures automatic deaeration, although fairly slowly.  The trap is unaffected by waterhammer.  UNITA 36h for horizontal and UNITA 36v for vertical installation.

UNITA 36

For continuous draining of gas and compressed-air systems, float traps with "Simplex" control units (i.e. without thermostatic air vent) are used.

To ensure perfect drainage, the air traps can be fitted with a balance pipe which allows air in the trap body to escape so that it cannot obstruct the flow of condensate into the trap.

A balance pipe is not necessary if the trap is installed directly below the equipment to be drained and if the drain line runs vertically.  In this instance the pipe leading to the trap should be of sufficient size so that any air can escape by bubbling through the condensate.  All air traps are equipped with a plug allowing a balance line to be connected, and are fitted with a float lifting lever to facilitate manual purging of the valve area.

UNA traps are fitted with a perbunan rubber valve ball to provide tight closure; a stainless steel valve ball may be specified for higher temperatures and pressures.  In the case of very small condensate flowrates the tightness of the valve closure should be considered.

This is a special version of the BK range of traps designed to save energy by holding back the condensate until it has cooled down to the adjustable discharge temperature, thus permitting the utilization of the sensible heat of the condensate and avoiding flash steam.  The Duo stainless steel thermostat is corrosion-resistant and unaffected by waterhammer.

Steam Traps UBK

Automatic drain valve for rapid condensate discharge during the start-up of steam plants and for draining the remaining condensate at shut-down.  The formation of a vacuum and possible frost damage are prevented.  To avoid freezing of the AK, the drain line should be kept as short as possible and the valve be included in the thermal insulation.  The valve is controlled only by the pressure.  It replaces a manually operated by-pass valve.

At start-up of the steam line the pressure in the line is initially zero, although steam is already condensing.  However, the condensate formed cannot be discharged by the steam trap into the rising condensate line, as there is not yet any differential pressure available to lift the condensate.  In this case, in the past a bypass valve mounted at the lowest point of the system had to be opened by hand, so that the condensate could drain freely.  As shown in the schematic representation, the drain valve ensures automatic condensate discharge as it remains open as long as there is no pressure.  The condensate is freely discharged until the pressure in the steam line has reached 0.8 bar (11.6psi) (factory-set closing pressure).  This pressure in the steam line is sufficient for the steam trap to discharge the condensate into the condensate-return line.  At this pressure the AK closes instantaneously and automatically.  When the steam system is shut down, the pressure in the steam line drops slowly.  As soon as the pressure has dropped below 0.8 bar, the AK opens, discharges the remaining condensate and prevents the formation of vacuum.

The valve can also be used as thermodynamic steam trap with stage nozzle (without sampling valve.)

Control valves ZK with radial stage nozzle
For pressure ratings up to 56 bar (8120 psi)

The valve can also be used for injection-cooling, level and leak-off control, as well as for drainage duties.

Continuous Blowdown Valves BA 36,
Control Valves ZK