Miyawaki TB7N-SR Temperature Control Steam Trap

Manufacturer: MIYAWAKI Inc.
Model: TB7N-SR

Features

Takes only 1/10th of the previous time required to remove scale
Disassembly before cleaning is no longer needed. Remove scale instantly by simply turning a handle with no need to stop the flow of steam. The time required is approximately 3 minutes per trap.

Elimination of flow channel-blocking scale
Lots of scale builds up in the flow channel (valve hole inlet and outlet) of temperature control traps. Scale removal work is performed from below the valve hole, so it is possible to get rid of all scale.

Pre-emptive action before closing performance deteriorates
This product enables efficient regular scale removal work. Poor closing performance caused by scale can be prevented through regular scale removal.

Superb durability
The MIYAWAKI SCCV (Self Closing and Centering Valve) System has the effect of increasing durability by achieving soft closing during operation.
Consisting of a free rotating valve that is centered and guided by the condensate flow, hence perfectly fitted in the valve seat even under extreme conditions of high pressure applications. This significantly reduces wear and erosion of the valve components.

Typical applications

Suitable for steam main lines, trace lines, and other such applications.

Dimensions/Weight

Screwed / Socket Weld

Size Dimensions (mm) Dimensions (in) Weight
L H1 H2 W L H1 H2 W (kg) (lb)
1/2” 70 82 54 56 2.8 3.2 2.1 2.2 1,0 2.2
3/4” 80 3.2 1,1 2.4
1” 1,2 2.7

Flanged

TB7N-SR

JIS,ASME 

Size Dimensions (mm) Dimensions (in) Weight (kg) Weight (lb)
L H1 H2 W L H1 H2 W JIS(FF,RF) JIS(RF) ASME/JPI(RF) JIS(FF,RF) JIS(RF) ASME/JPI(RF)
10K,16K 20K 30K 150lb 300lb 10K,16K 20K 30K 150lb 300lb
1/2” 145 82 54 56 5.7 3.2 2.1 2.2 2,5 2,6 2,7 2,1 2,6 5.5 5.7 6.0 4.6 5.7
3/4” 2,9 3,0 3,1 2,6 3,5 6.4 6.6 6.8 5.7 7.7
1” 4,0 4,2 4,3 3,3 4,3 8.8 9.3 9.5 7.3 9.5

DIN PN40

Size Dimensions (mm) Dimensions (in) Weight
L H1 H2 W L H1 H2 W (kg) (lb)
DN15 150 82 54 56 5.9 3.2 2.1 2.2 2,7 6.0
DN20 3,5 7.7
DN25 160 6.3 4,1 9.0

*Customized face-to-face dimensions on request.
*Please contact MIYAWAKI for further information.

Specifications

Model Connection Max. operating pressure Max. operating differential pressure Max. operating temperature Adjustable range Standard set temperature Body material
Type Size PMO

(MPa)

PMO

(psig)

(MPa) (psig) TMO

(℃)

TMO

(℉)

(℃) (℉) (℃) (℉)
TB7N-SR Screwed

Rc,NPT

1/2” 2,1 305 2,1 305 230 446 50 – 200 122 – 392 100

(at 1,0MPa)

212
(at 145psig)
Forged steel

A105

3/4”
1”
TB7NF-SR Flanged

FF,RF

1/2”
3/4”
1”
TB7NW-SR Socket Weld

SW

1/2”
3/4”
1”

*Installation in both horizontal and vertical piping is possible, but please install with a downward tilt to ensure condensate can easily run into the steam trap.

*It is possible to change the standard factory set temperature. Please specify the operating pressure and set temperature.

*Please refer to the installation manual how to adjust the set temperature.

Discharge Capacity

⊿t is the difference between the temperature of a temperature control trap when the valve is initially opened and condensate temperature. The temperature difference (⊿t) upon the initial passage of air is great, and indicates that the flow rate will also increase.

*  Curve1 shows the trap’s maximum capacity when discharaging cold condensate.

**Curve2 shows the trap’s maximum capacity when discharaging hot condensate at a temperature of 10°C (18°F) below the adjusted temperature of the trap.

Procedure for scale removal

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