FLOWSERVE GESTRA Steam Traps and Steam Trap Testing

The GESTRA Steam Trap Range What are steam traps? To be able to operate a plant over a long period with an optimum efficiency the choice of the cor­ rect valves is of vital im­ ortance. p Amongst these valves are steam traps which have an important role to play. Steam must be trapped within heating equipment until it has surrendered all heat energy, at which point the condensate ­ thereby formed must be imme­ iately dis­ harged. d c The optimum efficiency of a steam­ eated plant is ­ h dependent upon the performance of steam traps. One type of steam trap cannot be equally well suited for the...

Steam Traps and Steam Trap Testing Short Guide to Steam Trap Selection 1. Operation with different condensates Pump trap type UNA 25-PK Ball float trap type UNA with Duplex control Ball float trap type UNA with Simplex control Thermodynamic trap type DK Steam trap types Trap type BK with bimetallic regulator Trap type MK with membrane regulator Not all steam trap types are equally suitable for a given application. Depending on the operating conditions and service in question, one or more systems will be particularly well suited. The following table contains 15 criteria for steam trap selection...

Duo Steam Traps BK Thermostatic steam traps with Duo stainless steel (bimetallic) regulator Pressure ratings up to PN 630. For roughest operating conditions. Unexcelled service life. Operating principle resulting in a sturdy design unaffected by water­ ammer and frost. h May also be used as air vents. Operation 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...

Steam Traps and Steam Trap Testing Rhombus-shaped cover ◗ secured with only two bolts, which are easy to insert and easy to use in restricted spaces Temperature feeler of Duo stainless steel plates ◗ Thermostatic control. Corrosion-resistant throughout, fatigue-free, not subject to ageing Thermovit regulator ◗ Light and compact regulator unit, replaceable without removing body from pipeline. Withstands waterhammer and freezing. Easy maintenance Stage nozzle ◗ Thermodynamic control. Wear resistant. Freely mounted for non-return valve action Large-surface strainer ◗ ◗ Recessed flat gasket for superior...

Steam Traps and Steam Trap Testing Flanged ends Butt-weld ends Socket-weld ends Screwed sockets

Steam Traps MK Thermostatic steam traps with mem­ rane b regulator. Pressure ratings up to PN 40. Unexcelled regulating accuracy due to thermostatic capsule. May also be used for thermal air-venting. ­ With Tandem seat (double sealing) for low condensate flow­ ates. For larger conden­ ate r s flowrates with single seat. The main feature of the MK traps is an unusually 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...

Steam Traps and Steam Trap Testing Rhombus-shaped cover ◗ secured with only two bolts, which are easy to insert and easy to use in restricted spaces Thermostatic capsule ◗ Regulator unit replaceable without removing body from pipeline. Precise reaction to any change in temperature. Corrugated membrane of Hastelloy®. High elasticity, long service life Tandem seat ◗ Double sealing Non-return valve with hollow cone and reduced mass ◗ Quick closing in the event of waterhammer ◗ Recessed flat gasket for superior sealing ◗ Metal base bushing

MK Types and Connections MK 45 MK 45 A MK 35/2S (DN 25) MK 35/2S3 (DN 25) MK 25/2 (DN 40/50) MK 25/2S (DN 40/50) Flanged ends Socket-weld ends Butt-weld ends Screwed sockets The GESTRA MK steam traps at a glance

Steam Traps and Steam Trap Testing GESTRA Duo Super steam traps TK for very large condensate flowrates up to PN 25 The traps with thermostatic pilot control using thermostatic capsules are used for the discharge of very large amounts of condensate. The regulating characteristic and the control effect of these traps are similar to those of the membrane traps. If, for a special application, the trap must not close completely, a leak passage can be adjusted. It is, however, also possible to restrict the valve lift to obtain continuous operation. To guarantee a rapid response of the traps they are...

Ball Float Traps UNA Pressure ratings up to PN 160 For condensate discharge without bankingup 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)...

Steam Traps and Steam Trap Testing Bolted cover ◗ Closed or sightglass cover (water-level indicator) Upper plug ◗ Installation of manual vent valve or air balance possible Thermostatic bellows ◗ for automatic air-venting (“Duplex” control). Without bellows (“Simplex” control) for cold fluids Control unit ◗ Easy maintenance after opening cover. Complete unit may be changed without removing body from pipeline Closing unit (orifice) ◗ A selection of orifice sizes for high and low pressure applications Deflector ◗ guarantees the deflection of the condensate stream and reduces wear on the trap body...

Steam Traps and Steam Trap Testing UNA ball float traps at a glance Max. differConnections, DN ential pressure (psi) Flanged Stainless steel Screwed Socket-weld Butt-weld / 2"–1" / 2"–1" Stainless steel