MDR 816/817

Container systems commercial & industrial

The medium pressure regulators 816 and 817 are 1st stage pressure regulators for liquefied gas, which reduce the unregulated pressure from the liquefied gas container to 0.75 bar (MDR-816) or 1.5 bar (MDR-817) outlet pressure.

A safety shut-off valve (OPSO) and a safety relief valve (PRV) are fitted to the regulators as safety-related equipment.

PN 25 medium pressure regulator – “f” – 100/150 kg/h
DVGW approved: According to EN 16129/ CE approved according to 2016/426/EG

TECHNICAL DATA MDR 816-817
  • DVGW approved: According to EN 16129/ CE approved according to 2016/426/EC
  • Inlet pressure: 1.5-16 bar
  • Inlet connection: G 1 “IG or others on request
  • Outlet connection: G 1 “IG or others on request
  • Capacity MDR-816: 100 kg/h (propane)
  • Outlet pressure MDR-816: 0.75 bar or other on request
  • Overpressure safety shut-off valve (OPSO) MDR-816: 1.2-4.7 bar
  • Overpressure safety relief valve (PRV) MDR-816: 1.4-5.0 bar
  • Output MDR-817: 150 kg/h (propane)
  • Outlet pressure MDR-817: 1.5 bar or other on request
  • Overpressure safety shut-off valve (OPSO) MDR-817: 2.2-4.7 bar
  • Overpressure safety relief valve (PRV)MDR-817: 2.5-5.0 bar
  • Weight: 5 kg
  • Gas: LPG/LNG
  • Operating temperature: -40°C to +80°C
OPERATING PROCEDURES

The pressure regulator reduces the unregulated pressure from the liquid gas container in a single stage to 0.75-1.5 bar.
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 pressure regulator.
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
Medium pressure regulator MDR-816 Output pressure Performance Order number
MDR-816-G 1 IG x G 1 IG 0,75 bar 100 Kg/h 1 00 816 8 5 000 0
MDR-816-FLA x FLA DN25 0,75 bar 100 Kg/h 1 00 816 8 5 000 1
MDR-816-RVS22 x RVS22 0,75 bar 100 Kg/h 1 00 816 8 5 222 0
MDR-816-RVS28 x RVS28 0,75 bar 100 Kg/h 1 00 816 8 5 228 0
       
Medium pressure regulator MDR-817 Output pressure Performance Order number
MDR-817-G 1 IG x G 1 IG 1,5 bar 150 Kg/h 1 00 817 8 5 000 0
MDR-817-FLA x FLA DN25 1,5 bar 150 Kg/h 1 00 817 8 5 000 1
MDR-817-RVS22 x RVS22 1,5 bar 150 Kg/h 1 00 817 8 5 222 0
MDR-817-RVS28 x RVS28 1,5 bar 150 Kg/h 1 00 817 8 5 228 0
INSTALLATION AND OPERATING INSTRUCTIONS

PN 25 medium pressure regulator – “f” – 100/150 kg/h
DVGW approved: According to EN 16129/ CE approved according to 2016/426/EC

TYPE MDR-816/817 with OPSO & PRV

DESCRIPTION
The pressure regulators MDR-816/817 are 1st stage pressure regulators which reduce the unregulated pressure from the LPG container to a fixed outlet pressure.
A safety shut-off valve (OPSO) and a safety relief valve (PRV) are fitted to the pressure regulator as safety-related equipment.

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 (see table) is reached. It must be opened manually after closing.

2. Pressure regulator
The pressure regulator reduces the unregulated pressure from the liquid gas container to a fixed set outlet pressure ( see table).

3. Safety relief valve (PRV)
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 ( see table).
It closes again automatically when the pressure drops below the set pressure.

B. MODE OF OPERATION
The pressure regulator reduces the unregulated pressure from the liquid gas container in a single stage to nominally 0.75 – 2.5 bar. 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 pressure regulator.
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 into the atmosphere after the set response pressure has been reached.

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

C. C. ASSEMBLY
The pressure regulator can be mounted in the pipeline using commercially available transitions.

IMPORTANT ! – Use only proper tools for assembly. – 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).
– Unscrew the brass cap of the OPSO.
– Pull out the OPSO tappet by means of the inverted brass cap until it engages
– Screw the brass cap back on
– Slowly open the extraction valve on the liquid gas container.

E. Functional test of the container pressure regulator
– 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 must be 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.