Armstrong SH-1500 Series superheat steam traps operate by the effect that rising temperature has on the thermostatic bimetallic elements. At start-up, the valve is wide open, which allows a large volume of non-condensables and cold condensate to be removed from the system. When the system reaches steam temperature, the elements become sufficiently hot to pull on the trap’s valve stem, closing the valve.

The valve remains closed until the bimetallic elements cool, thus allowing the valve to crack open, vent the condensate and non-condensables, and then close again when steam temperature is reached. The SH Series superheat steam traps adjust automatically to changing conditions. Hot elements in the valve generate forces to offset rises in pressure. The SH-1500 series utilizes titanium valves and seats to ensure extremely long service life in the harsh environment of superheated steam systems.

Specifications

Bimetallic style steam traps type SH-1500 are constructed in investment cast chromemoly steel with an integral stainless steel strainer and are inline repairable. The mechanism consists of a stacked nickel-chrome bimetal operator with a titanium valve and seat. The steam trap is capable of operation on low-load applications throughout its pressure/temperature range.

Maximum Operating Conditions

Condition	Value
Maximum allowable pressure (vessel design)	124 bar @ 565°C
Maximum operating pressure	124 bar
Maximum back pressure	99% of inlet pressure
Suggested minimum operating pressure	41 bar

Materials

Component	Material
Connections	20 – 25 mm: Buttweld, Flanged EN 1092-1 or ASME B16.5
Body and Cap	ASTM 217 Gr. C12A
Valve & Seat	Titanium
Bimetallic Elements	Nickel-chrome and stainless steel
Strainer	Stainless Steel Screen

Dimensions and Weights

Model	SH-1500	SH-1500
Pipe Connections (mm)	20	25
“B” (Height BW) in mm	129	129
“C” (Face-to-face BW - with extended nipples) in mm	157	157
“D” (Centerline to Top) in mm	98	98
“E” (Width) in mm	123	123
“F” (Face-to-face Flanged ANSI 1500#) in mm	475	481
“G” (Height Flanged ANSI 1500lbs) in mm	163	173
Weight in kg (BW)	10.4 kg	10.4 kg
Weight in kg (Flanged ANSI 1500#)	16.5 kg	18.5 kg

INFO

Standard flanges are in carbon steel; stainless steel flanges are optional. Other flange sizes, ratings, and face-to-face dimensions are available on request. All sizes comply with Article 4.3 of the PED (2014/68/UE).

Capacity Charts

Cold Water Capacity

Hot Condensate Capacity

Maintenance

WARNING

Equipment under pressure - Operating temperature > 100°C - Make sure the trap is cold before handling!

Replacement of Bimetallic Elements and Screen

1. Remove the complete trap from the steam line.
2. Unscrew the 4 bolts (10) and lift the cap (1).
3. Unscrew and replace the bimetallic elements (6).
4. Important: For the SH-1500, the distance between the flat bimetallic elements (6) and the seat (3) should be 2.15 mm.
5. Clean or replace the screen (5).
6. Replace the gasket (7).
7. Put the cap (1) back on the body (2) and screw the 4 bolts (10).