Medium pressure regulator MDR-816/817
Classification
Container systems commercial & industrial
Medium pressure regulator – PN 25
- Overview MDR-816:
Mg: 100 kg/h – Pd: 0.75 bar – OPSO: 1.2 bar – PRV: 1.4 bar - Overview MDR-817:
Mg: 150 kg/h – Pd: 1.5 bar – OPSO: 2.2 bar – PRV: 2.5 bar
DVGW approved: According to EN 16129/ CE approved according to 2016/426/EC
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.
Now New! An MDR-817 with an adjustable outlet pressure of 2.5 – 4.0 bar
A safety shut-off valve (OPSO) and a safety relief valve (PRV) are fitted to the regulators as safety-related equipment.
The 2nd stage is usually carried out via a low pressure regulator NDR-820 to 824 (available with or without safety diaphragm), which must be purchased separately.
TECHNICAL DATA
- DVGW approved: According to EN 16129/ CE approved according to 2016/426/EC
- Capacity MDR-816: 100 kg/h (propane)
Outlet pressure: 0.75 bar or other on request
Overpressure safety shut-off valve (OPSO): 1.2-4.7 bar
Overpressure safety relief valve (PRV): 1.4-5.0 bar - Capacity MDR-817: 150 kg/h (propane)
Outlet pressure: 1.5 bar or other on request
Overpressure safety shut-off valve (OPSO): 2,2-4,7 bar
Overpressure safety relief valve (PRV): 2,5-5,0 bar - Inlet pressure: 1.5-16 bar
- Inlet connection: G 1 “IG or others on request
- Outlet connection: G 1 “IG or others on request
- Weight: 5 kg
- Gas: LPG / LNG / propane / butane / natural gas or others on request
- 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 | Capacity | 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-flange x flange DN25 | 0,75 bar | 100 Kg/h | 1 00 816 8 5 000 0 |
| MDR-816-RVS22 x RVS22 | 0,75 bar | 100 Kg/h | 1 00 816 8 5 000 0 |
| MDR-816-RVS28 x RVS28 | 0,75 bar | 100 Kg/h | 1 00 816 8 5 000 0 |
| Medium pressure regulator MDR-817 | Output pressure | Capacity | 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-flange x flange 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 |
| MDR-817-G 1 IG x G 1 IG | 4,0 bar | 150 Kg/h | 1 00 817 8 5 004 0 |
INSTALLATION AND OPERATING INSTRUCTIONS
Medium pressure regulator – PN 25
- Overview MDR-816:
Mg: 100 kg/h – Pd: 0.75 bar – OPSO: 1.2 bar – PRV: 1.4 bar - Overview MDR-817:
Mg: 150 kg/h – Pd: 1.5 bar – OPSO: 2.2 bar – PRV: 2.5 bar
DVGW approved: According to EN 16129/ CE approved according to 2016/426/EC
TYP 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. 1st stage 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.
C. ASSEMBLY
The pressure regulator can be mounted in the pipeline using commercially available transitions.
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
- Set pressure and function test of OPSO/PRV: test port G1/8
