Process Technologyof Pennsylvania, Inc.
Series 56

Renew Bimetal Traps

Our bimetal tracing and drip trap in a renewable body: replace the sealed trap capsule in line in five minutes, with no pipe unions needed.

Max pressure
300 psi (21 bar)
Max temperature
500 °F (260 °C)
Body rating
ANSI Class 300
Sizes
3⁄8" – 3⁄4" NPT
Request a quote Dimensions & weights
PT Series 56 renewable bimetal steam trap

Applications

Tracing or drip applications with condensate discharge to atmosphere or to condensate return systems. Best suited for piping systems where in-line renewability is essential.

Operating principle

A series of bimetal discs senses the trap inlet temperature and pressure and controls the discharge temperature of condensate at around 50 °F (28 °C) below the saturation temperature of the inlet steam.

Design features

  • 5-minute in-line renewability
  • No need for pipe unions
  • Excellent thermal efficiency
  • Excellent dirt handling capability
  • Fail-open
  • Resistance to corrosion and hydraulic shocks
  • Self-draining and freeze-proof
  • Venting of air and non-condensable gases
  • Superheating capability
  • Compact and light weight; easy installation
  • All stainless steel trap
  • Built-in check valve
  • 3-year warranty on trap capsule; 10-year warranty on other trap parts

Capacities

Capacity chart: hot and cold discharge versus inlet pressure
Hot discharge measured within 10 °F (6 °C) below trap opening temperature. Cold discharge measured at 70 °F (21 °C).

Parts and materials

Cross-section drawing of the Series 56 trap with numbered parts
ItemPartMaterial
1End fittingStainless steel
2*SealsTFE, graphite
3*Body housingStainless steel
4*Name plateAluminum
5*Body plateStainless steel
6*SpacerStainless steel
7NutsStainless steel
8BoltsStainless steel
9*Lock nutStainless steel
10*WashersStainless steel
11*Bimetal discsCorrosion resistant bimetal
12*ValveStainless steel
13*Mounting plateStainless steel
14Nut washersStainless steel

* Completely seal-welded trap capsule parts and seals included in the repair kit.

Repair kit: specify 50-RK. Each kit contains one completely tested trap capsule and two seal O-rings.

Dimensions and weights

End connectionin (DN)“W” Øin (mm)“L”in (mm)Weightlb (kg)
3⁄8 (10)2 1⁄2 (64)3 3⁄16 (81)1.30 (0.59)
1⁄2 (15)2 1⁄2 (64)3 3⁄16 (81)1.34 (0.61)
3⁄4 (20)2 1⁄2 (64)3 3⁄16 (81)1.40 (0.64)

Installation

Install trap horizontally or vertically downward with a strainer at the trap inlet.