Boiler house

Level controls

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. © Copyright 2014

2.3.21

LP30

High Integrity, Self-monitoring

Low Level Alarm Probe

The probe has a level sensing tip (probe tip), and a comparator tip.

The earth return path is via the body connection.

Under normal operating conditions the probe tip is partially immersed,

and the resistance to earth is low. When the water level drops below

the probe tip the resistance to earth becomes high, causing the

controller to give a low level alarm signal.

Principal features:

-

High integrity, self-monitoring low level alarm probe.

-

Suitable for pressures up to 32 bar g at 239°C.

-

No maintenance required.

-

Positively retained probe tip.

TI-P402-43

AB Issue 10

4

Pg 11

Cable gland

2

Description

The Spirax Sarco LP30 level probe is used with a Spirax Sarco

LC3050 level controller to provide a high integrity, self-monitoring low

level alarm signal, usually in a steam boiler. It consists of a

probe body with a removable cable socket, and a separate

screw-on probe tip which is retained by a lock-nut and pin.

5

3

The comparator tip compensates for any leakage to earth caused by

scale, dirt, or internal moisture, ensuring a low water alarm signal

even under adverse conditions.

Approvals:

The LP30 is also available with a 1⁄2" NPT screwed connection,

approved to UL61010. Please note that this version will not be

1

Caution:

The probe is not suitable for outside installation without

additional environmental protection.

8

marked and is not suitable for Europe.

Available tip lengths mm (inches)

6

7

500 (19.7), 1 000 (39.4) and 1 500 (59).

Pressure/temperature limits

10

Nominal pressure rating

Maximum boiler pressure

Maximum temperature

Maximum ambient temperature

Designed for a maximum

PN40

32 bar g

239°C

70°C

60 bar g

50 metres

(464 psi g)

(462°F)

(158°F)

(870 psi g)

(164 ft)

BS EN 10088-3

(1.4306)

Type 316L

Type 316L

BS 6564 Grade

UA Type 1

Type 302/304

Type 316L

BS 6105 A4 80

cold hydraulic pressure test of:

Technical data

Maximum probe cable length

Materials

No. Description

1

Probe body

2

Cover assembly

Material

3

Name-plate

4

Cable socket and

Austenitic

stainless steel

Austenitic

stainless steel

Polycarbonate

Polyamide, glass filled

Silicone elastomer

Austenitic

stainless steel

PTFE

Austenitic

stainless steel

Austenitic

stainless steel

Austenitic

stainless steel

probe connector

5

Connector gasket

6

Comparator tip

7

Primary insulator and

9

secondary insulator

8

Retaining pin

9

Probe tip

10 Lock-nut