Steam Trap

Design Standards

Design and manufacturing: ASME B16.34

Structural length: ASME B16.10

Connection size: butt welded ends shall comply with ASME B16.25;

Socket welded ends shall comply with ASME B16.11,

Flange ends shall comply with ASME B16.5

Pressure-Temperature: ASME B16.34

Test-Inspection: API 598

Helium mass spectrometry leak detection: API 602

Structural Features

Special treatment of sealing surface

In order to improve the erosion ability of the steam trap to resist steam-water two-phase flow, the valve seat surface is made of high-wear-resistant starley alloy.

Built-in metal bellows

● Avoid contact between the medium and the valve stem to ensure zero external leakage.

● Since the bellows are built-in type, it can effectively prevent media from scouring the bellows, and the motion guidance is more reliable.

● The lower end of the bellows and the valve stem assembly are automatically roll welded to form a metal barrier between the fluid medium and the large area.

"Y" shaped flow channel

The medium flows through the valve in a nearly straight line and has a high Cv value.

Stuffing box

Screw the packing gland into the stuffing box, leaving holes for easy tightening of the packing from the bonnet window.

Guide ring

The direction of the bonnet and valve stem is fixed by a guide ring to protect the bellows from torque.

Main Parts & Materials

Body——preferred material 12Cr1MoV, other recommended materials F91, 304, 316, 316L

Seat——Stellite6(≈40HRC)

Disc——preferred material 12Cr1MoV, other recommended materials 304

Disc sealing surface——Stellite12(≈46HRC)

Bellows——preferred material 12Cr1MoV, other recommended materials 304, 316, 316L

Filler——flexible graphite

Lower valve stem——preferred material 12Cr1MoV, other recommended materials F91, 25Cr2MoV, 4Cr9Si2

Application Scenarios

It can be used in the main steam pipe drainage system of power plants, the steam turbine body drainage system, extraction steam pipes, feed pump outlets, etc.