GFR 404

Large cylinder systems according to F2

The low pressure regulator 404 is a pressure regulator for cylinder systems for liquefied petroleum gas, which reduces the unregulated pressure from the cylinder system to a nominal outlet pressure of 50 mbar. A safety shut-off valve (OPSO) and a safety relief valve (PRV) are fitted to the regulator as safety-related equipment.

PN 16 low-pressure regulator – “f” – 4 kg/h
DVGW approved according to EN 16129/ CE approved according to 2016/426/EC

Operating and assembly instructions

TECHNICAL DATA

DVGW approved: According to EN 16129/ CE approved according to 2016/426/EG
Nominal flow rate : 4 kg/h (propane)
Nominal response pressure OPSO (SAV) : 132 mbar or other on request
Nominal response pressure PRV : 150 mbar or other on request
Inlet pressure : 0,3 – 16 bar
Inlet : GFA
Outlet pressure : 50 mbar or other on request
Outlet : G 1/2″ IT or other on request
Weight : 2 kg
Gas : LPG/LNG/Propane/Butane/Natural gas
Operating temperature : -40°C to +50°C

OPERATING PRINCIPLES

The pressure regulator reduces the unregulated pressure from the gas cylinder to the set outlet pressure. In the event of an impermissibly high increase in the outlet pressure at the regulator, the response pressure of the overpressure safety valve (OPSO) is reached, which then closes automatically and shuts off the gas flow upstream of the regulator. The operating status of the OPSO can be read from the visual display.

Clear = Open
Red = Closed

If there is a further increase in pressure, e.g. due to the OPSO not closing completely, the safety relief valve (PRV) automatically releases a limited amount of the gas flow to the atmosphere after the set response pressure has been reached.

PRODUCT TYPES

Large cylinder regulator GFR 404	Outlet pressure	Performance	Order number
GFR-404-GFA x G 1/2 IG	50 mbar	4 kg/h	1 00 404 8 5 000 0
GFR-404-GFA x LVS 15	50 mbar	4 kg/h	1 00 404 8 5 115 0
GFR-404-GFA x LVS 18	50 mbar	4 kg/h	1 00 404 8 5 118 0
GFR-404-GFA x RVS 12	50 mbar	4 kg/h	1 00 404 8 5 212 0
GFR-404-GFA x RVS 15	50 mbar	4 kg/h	1 00 404 8 5 215 0
GFR-404-GFA x RVS 18	50 mbar	4 kg/h	1 00 404 8 5 218 0
GFR-404-GFA x PVS 15	50 mbar	4 kg/h	1 00 404 8 5 515 0
GFR-404-GFA x PVS 18	50 mbar	4 kg/h	1 00 404 8 5 518 0
GFR-404-FLA x G 1/2 IG	50 mbar	4 kg/h	1 00 404 8 5 000 2
GFR-404-G 1/2 IG x G 1/2 IG	50 mbar	4 kg/h	1 00 404 8 5 012 0

INSTALLATION AND OPERATING INSTRUCTIONS

PN 16 low pressure regulator – “f” – 4 kg/h
DVGW approved according to EN 16129/ CE approved according to 2016/426/EC

TYPE GFR-404 with OPSO & PRV

DESCRIPTION
The pressure regulator reduces the unregulated pressure from the gas cylinder to the set outlet pressure. In the event of an impermissibly high increase in the outlet pressure at the regulator, the response pressure of the overpressure safety valve (OPSO) is reached, which then closes automatically and shuts off the gas flow upstream of the regulator. The operating status of the OPSO can be read from the visual display..

A. INDIVIDUAL DESCRIPTIONS
1. Safety shut-off valve (OPSO)
The OPSO is open during normal operation and has the function of automatically shutting off the gas flow as soon as the set response pressure is reached. It must be opened manually after closing.

2. Pressure regulator
The pressure regulator reduces the unregulated pressure from the cylinder system to the fixed outlet pressure of 50 mbar.

3. Safety relief valve (SRV)
The PRV is closed during normal operation and has the task of automatically releasing the gas flow as soon as the pressure in the system to be protected has reached the set pressure.
It closes again automatically when the pressure drops below the set pressure.

B. MODE OF OPERATION
The single-stage pressure regulator reduces the unregulated pressure from the liquid gas container in a single stage to a nominal 50 mbar.
In the event of an impermissibly high increase in the outlet pressure at the pressure regulator, the response pressure of the safety shut-off valve (OPSO) is reached, which then closes automatically and shuts off the gas flow upstream of the 1st stage pressure regulator. The respective operating status of the OPSO can be seen on the visual display.

Clear = open
Red = closed

ATTENTION ! All activities described in points C, D and E may only be carried out by authorised specialist personnel..

C. ASSEMBLY
The single-stage regulator is connected with the GFA connection according to DIN 4811 to the extraction valve of the liquid gas cylinder.
It is essential to ensure that the pressure regulator is installed with an inclination of approx. 20° so that the ventilation openings point downwards.

IMPORTANT ! • Only proper tools should be used for installation. – Avoid exerting any force on the pressure regulator when tightening the GFA connection. – Prevent sealants from getting into the gas-carrying components. – Always counteract threaded connections with suitable spanners. – After assembly, a careful leak test must be carried out.

D. START-UP
Start-up is carried out by slowly opening the extraction valve on the liquid gas container.
If the OPSO has locked, the following steps are required:

– Close the extraction valve on the liquid gas container
– Relieve the pressure at the pressure regulator (inlet and outlet).
– Twist off the plastic cap of the OPSO
– Pull out the OPSO plunger until it engages.
– Screw the plastic cap back on
– Slowly open the extraction valve on the liquid gas container.

E. FUNCTION TEST OF THE PRESSURE REGULATOR
– Check the inlet pressure: test connection G1/4 no. 8
– Check the outlet pressure: test port G1/8 no. 3
– Set pressure and function test of OPSO/PRV: test port G1/8 no. 3.

During the test, the gas supply must be interrupted and the consumer unit closed. A safe and quick function test can be carried out with the “Müller test device”. A leak test must be carried out after each test.

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