Pipeline ancillaries

Sight glasses

ISO 9001

Steam

saturation

curve

7.9.3

TI-P022-01

ST Issue 8

Cert. No. LRQ 0963008

Sight Check

(Combined Sight Glass and Check Valve)

Description

A sight check is a combined sight glass and check valve. It is

used to observe discharges from steam traps. The position of

the ball check indicates whether or not condensate is flowing.

Where condensate rises after the trap it eliminates the need for a

separate check valve thus simplifying installation.

8

7

6

2

5

Certification

2

This product is available with a manufacturers' Typical Test Report.

Note: All certification/inspection requirements must be stated at

1

the time of order placement.

Sizes and pipe connections

1⁄2", 3⁄4" and 1" screwed BSP or NPT.

Pressure/temperature limits

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Body design conditions

PMA Maximum allowable pressure

TMA Maximum allowable temperature

Minimum allowable temperature

PMO Maximum operating pressure

TMO Maximum operating temperature

The sight check is particularly useful for commissioning a

steam trap fitted with an adjustable needle valve/steam lock

release (SLR).

It can also be used on other liquid lines where the materials of

construction are compatible.

Standards

3

This product fully complies with the requirements of the European

Pressure Equipment Directive 97/23/EC.

4

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Pressure bar g

The product must not be used in this region.

PN3.6

3.5 bar g @ 148°C

148°C @ 3.5 bar g

-10°C

3.5 bar g @ 148°C

148°C @ 3.5 bar g

0°C

Note: For lower operating temperatures consult Spirax Sarco

Minimum operating temperature

Designed for a maximum cold hydraulic test pressure of 7 bar g

PTMX Maximum test pressure (steam service)

3.5 bar g

1"

4.59

Cv (US) = Kv x 1.156

Kv values

Size

Kv

For conversion:

Materials

No. Part

1 Body

2 Gasket

3 Sight tube

4 Discharge tube

5 Ball check

6 Cover

7 Cover bolts

8 Shakeproof washers

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification without notice.

1⁄2"

3⁄4"

2.6

2.81

Cv (UK) = Kv x 0.963

Material

Bronze

Glass reinforced graphite laminate

Borosilicate glass

Copper

Stainless steel

Brass

Steel zinc plated

Steel zinc plated

EN 1982 CC491K

BS 2871 PT2 C106

BS 970 420 S45

EN 12165 CW617N

BS 3692 Gr. 8.8

© Copyright 2008

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