Spirax Sarco - Catalogo Agosto 2017

Steam traps

Bimetallic

Capacities (in accordance with ISO 7842)

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Differential pressure bar (x 100 = kPa)

Hot water

Cold water

Dimensions/weights (approximate) in mm and kg

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P625-03) supplied with the product. The USM21 can be installed

on any Spirax Sarco pipeline connector. See separate Installation

and Maintenance Instructions for Spirax Sarco pipeline connectors

(IM-P128-06, IM-P128-11 and IM-P128-13).

Disposal

The USM21 trap unit is manufactured from stainless steel and is

therefore totally recyclable. No ecological hazard is anticipated with

the disposal of this product provided due care is taken.

Spare parts

The USM21 is a sealed non-maintainable trap unit. No internal

spares are available. The spares which are available are shown in

heavy outline. Parts shown in a broken line are not available as

spares.

Available spares

Connector screws (2 off)

Complete USM21 trap unit

inclusive of gaskets (9 and 10) and connector screws (11)

Note: The gaskets contain sharp metal reinforcement, please

handle with care.

How to order spares

Always order spares by using the description given in the column

headed 'Available spares' and state if ordering a complete trap the

nominal operating temperature of the steam trap.

Example: 2 off Connector screws for a USM21 sealed bimetallic

Model

USM21

Weight

(Trap only)

0.6

steam trap.

Gaskets

10 9

Trap unit

How to specify

Steam traps shall be of the sealed bimetal thermostatic USM21 type

manufactured in stainless steel and be suitable for operating

pressures up to 21 bar. Traps to be zero maintenance and to be

connected to separate pipeline connectors by two screws for quick

and simple installation / replacement. The thermostatic element is to

nominally operate at 10°C, 30°C, 50°C or 70°C below steam

temperature. Traps can be installed in any plane.

How to order

The USM21 is supplied in two parts:-

Recommended tightening torques

Item

No.

Part

Connector screws

1. The swivel

pipeline connector

PC10HP

PC20

IPC2 _

PC3_

Standard connection

+ 'Y' type strainer

+ 'Y' type strainer and

Spiratec sensor

+ 1 integral ISO valve

N m

PC4_

2. The USM21 trap complete with inner and outer gaskets and

two connector screws.

Notes:

1. State the nominal subcooling temperature required.

2. Any optional extras need to be specified at the time of order

placement.

How to order example:

1 off 1⁄2" PC10HP swivel connector having screwed NPT

connections for use with a USM21 sealed bimetallic steam trap.

1 off Spirax Sarco USM21 sealed bimetallic steam trap, set to

operate nominally at 30°C below steam temperature.

+ 2 integral ISO valves