Miyawaki - Μειωτής πίεσης - REA20
■Operating principle
The valve provides a constant downstream pressure at a stable given inlet pressure and constant running flowrates.
Changes in the upstream pressure and fluctuating consumption on the secondary side will result in variations in downstream pressure.
The valve is not designed for dead-end services.
Due to carefully selected springs a wide range of pressure applications is available.
The model REA20 is a direct acting pressure reducing valve designed for use of compressible media, such as air and various gases and for incompressible media such as water, oil and others.
The pressure reducing valve can be delivered with ductile cast iron, cast steel or stainless steel housings.
●All important internal parts are manufactured in stainless steel.
●Soft sealing or metal sealing
Depending on the medium, the valve can be equipped with soft sealing or metal sealing valves/seats. As option, the valves can be equipped with a pressure gauge on the valve body.
- Max. Operating Pressure
- 2,5MPa
- Max. Operating Temperature
- 350℃
Features
Self-acting pressure reducing valves for liquids and gases
The model REA20 is a direct acting pressure reducinfgvalve designed for compressible media, such as air and various gasses and for incompressible media such as water, oil and others. The valve is self acting and does not require external energy.
Superb durability
Highly durable and carefully selected components, a 360° free rotating, conical plug and the lack of a sensitive diaphragm ensure outstanding lifetime of this valve.
Diaphram free design
The valve operates with an O-ring sealing and a piston design. Due to this design, no daiphragm and no external sensing line is required.
Wide range of pressure reduction
Due to careffully selected springs an outstanding reduction ratio of 25:1 is achieved.
Operating features of direct acting pressure reducing valves
Pressure changes on the downstream side are detected in the detection chamber, and the degree of opening of the valve is directly adjusted to keep the pressure on the downstream side at set pressure.
Options available
- additional pressure gauges
- tailored connections for special applications
- softsealing for leakage class VI
Typical applications
Ideally installed in any fluid system or technical gases, such as lube oil lines, pre-heater units, natural gas lines, pressurized air lines, LNG or gasoline tank systems. Fits perfectly for other technical gases such as Atzetylene, Ammonia, Carbondioxide.
Dimensions/Weight
Size (DN) | Dimensions (mm) | Kvs Value | Weight (kg) | ||
| L | H | h | |||
| 15 | 130 | 289 | 82 | 1,8 | 13,0 |
| 20 | 150 | 66 | 3,2 | 13,0 | |
| 25 | 160 | 66 | 5,0 | 14,5 | |
| 32 | 180 | 81 | 7,9 | 16,0 | |
| 40 | 200 | 83 | 13,0 | 18,0 | |
| 50 | 230 | 416 | 100 | 20,0 | 34,0 |
| 65 | 290 | 445 | 113 | 34,0 | 45,0 |
| 80 | 310 | 553 | 140 | 51,0 | 61,0 |
| 100 | 350 | 582 | 154 | 80,0 | 87,0 |
| 125 | 400 | 715 | 210 | 130,0 | 125,0 |
| 150 | 480 | 720 | 235 | 180,0 | 150,0 |
| 200 | 600 | 950 | 285 | 320,0 | 245,0 |
Specifications
Body Material
Ductile cast iron
EN-GJS-400-15
(GGG-40,0.7040)
Body design conditions
| PN16 | PN25 | |
| Max. design pressure (MPa) PMA | 1,6 | 2,5 |
| Max. design temperature (℃) TMA | 350 | 350 |
| Max. operating pressure (MPa) PMO | 1,5 | 2,2 |
| Max. operating temperature (℃) TMO | 350 | 350 |
Pressure - Temperature rating
| PN | Temperature ℃ | ||||||
| -10･･･+50 | 100 | 150 | 200 | 250 | 300 | 350 | |
| Pressure MPa | |||||||
| PN16 | 1,6 | 1,6 | 1,6 | 1,5 | 1,4 | 1,3 | 1,1 |
| PN25 | 2,5 | 2,5 | 2,4 | 2,3 | 2,2 | 2,0 | 1,8 |
Secondary pressure ranges
Secondary pressure range | DN15-DN40 | DN50 | DN65 | DN80 | DN100 | DN125-DN200 |
| MPa | Spring number per size | |||||
| 0,05-0,1 | 9 | 28 | 27 | 38 | 37 | On request |
| 0,1-0,16 | 8 | 27 | 26 | 37 | 36 | |
| 0,16-0,25 | 7 | 26 | 25 | 36 | 35 | |
| 0,25-0,4 | 6 | 25 | 24 | 35 | 34 | |
| 0,4-0,63 | 5 | 24 | 23 | 34 | 33 | |
| 0,63-1,0 | 4 | 23 | 22 | 33 | 32 | |
| 1,0-1,6 | 3 | 22 | 21 | 32 | 32 | |
Secondary pressure ranges higher than 1,6 MPa and lower than 0,05 MPa on request available.
A minimum differential pressure of 0,05 MPa is required.
Capacity Chart
