Product Handbook 2026 - Volume 2

Steam traps Balanced pressure

8

Spare parts The spare parts available are shown in solid outline. Parts drawn in a grey line are not supplied as spares.

Available spares Internals set for MST21

3, 4, 5, 6, 7

How to order spares Always order spares by using the description given in the column headed 'Available spares' and state the size, model number and capsule reference. Example : 1 off Internals set for a Spirax Sarco ¼" MST21 balanced pressure thermostatic steam trap having a 'STD' fill capsule for operation at 10 °C below steam saturation temperature.

1

6

5.2.7

4

3

8.2 24

5

Recommended tightening torques

7

or mm

Item Part

N m

¼" ½"

22

100 - 110

32

100 - 110

1 and 2

"

32

100 - 110

2

¾"

36

100 - 110

1"

41

100 - 110

TI-P125-08 CMGT Issue 11

Page 4 of 4

MST21 Stainless Steel Balanced Pressure Thermostatic Steam Trap

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