Emerson B NG Instruction Manual

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Instruction Manual

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NTB0704

April 2012 - Rev. 04

Type B NG

V

Conform PED art 3.3
Conforme DESP art 3.3

DESCRIPTION

TYPE B NG REGULATOR

The type B NG i s a two -stage pressure reducin g
regulator with an automatic safety device to avoid
outlet over-pressure (relief valve venting to atmos­phere) or stopping the gas fl ow in the event of an
abnormal drop in inlet or outlet pressure or an excess
fl ow condition.
Rearming is manual by using the push-button and
depending on models (B6 version only) a valve may
be associated. A removable vent fi lter is situated in
the inlet connec tion, and a vent screen (see sche­matic, item V).
The underground model is treated for anti-corrosion
and is painted.

Maximum allowable pressure: 5 bar

Operating temperature: -20 / 60°C

Certain conditions apply for usage outside these ranges.

INSTALLATION

CAUTION

• To be used with clean, dry and non-corrosive gas.

• All regulators, except for un derground version,
must be protected from direct contact of water
and corrosive atmosphere du e to construction
materials base with zinc, copper and aluminium
(cabinet installation recommended).

• Recommended installation positions : inlet and/
or outlet in vertical position.

• To avoid: vent facing upwards, without protector
or connector, in humid conditions (risk of water
penetration due to rain or condensation).

Volumn

Gas Type Density Weight
kg/m3 B6 B10

Manufactured gas (n)m3/h

• Butane air 1.20 1.552 11 4 7

• Propane air 1.15 1.487 11 4 7

Natural gas (n)m3/h

• Group L 0.64 0.827 27 6 10

• Group H 0.61 0.789 21 6 10

LP-gas kg/h

• Propane 1.56 2.017 37 7.2 12

Before connecting :

• Do not weld the inlet and outlet connections with
the regulator in place.

• Remove the protective capsules from the inlet and
outlet connections.

• Ensure that the pipeline is perfectly clean.

• Place the O-ring(s), (according to model) greasing
is recommended.

Connection

• Respect the gas fl ow direction indicated on the
regulator body.

• Respect the tightening torques by using a dyna­mometric wrench (inlet with tight shutoff metal
= 40 Nm, others according to O-ring used).

WARNING

Do not re-orientate the regulator after tight­ening connections, under no circumstances
should the r egulator be put under any geo­metr ical or dimen sional cons ecutive for ce
between inlet and outlet sides.

When connecting the vent (residential areas,
underground) the diameter used should not be
inferior to 10 mm and should not be obstructed.

COMMISSIONING OR REARMING

Close the downstream valve (if exis tent). Open the
upstream valve. Press on the green button for a few
seconds, then release. Open the downstream valve
(if existent).

Pressure Setpoint

Pds (mbar)

Nominal Flow

1