Miyawaki - Μειωτής πίεσης - REH20L
■Operating principle
This type is a pressure reducing valve with a downstream pressure sensing line (pulse line) designed for use of steam. The valve provides a precise downstream pressure even at changing inlet pressures.
Due to carefully selected springs, a wide range of pressure applications is available.
The valve is very well suited to intermittent or fluctuating loads at the secondary side.
It closes securely when the load on the secondary side will be zero.
● It can be delivered with ductile cast iron, cast steel or stainless steel housings.
● All important internal parts are manufactured in stainless steel. As option the valves can be equipped with a pressure gauge on the valve body.
- Max. Operating Pressure
- 6,4MPa
- Max. Operating Temperature
- 400℃
Features
Pressure reducing valves for steam
These are automatic valves that reduce the steam supply pressure to the certified pressure for the device in use, and keep it steady.
Due to carefully selected springs a wide range of pressure applications is available.
As option the valve can be equipped with a pressure gauge on the valve body.
Operating features of direct acting pressure reducing valves
Pressure changes on the secondary side are detected in the detection chamber, and the degree of opening of the valve is directly adjusted to keep the pressure on the secondary side at a set level.
Maximum pressure reduction ratio 25:1
Uses
Perfect for cleaning devices, foodstuff devices, and other forms of compact steam equipment.
Dimensions/Weight
Size (DN) | Dimensions (mm) | Kvs value | Weight (kg) | |||
| L | H | h | ||||
| PN40 | PN63-100 | |||||
| 15 | 130 | 210 | 435 | 82 | 1,8 | 14,5 |
| 20 | 150 | 230 | 66 | 3,2 | 14,5 | |
| 25 | 160 | 230 | 66 | 5,0 | 16,5 | |
| 32 | 180 | 260 | 81 | 7,9 | 18,5 | |
| 40 | 200 | 260 | 83 | 13,0 | 22,0 | |
| 50 | 230 | 300 | 647 | 100 | 20,0 | 37,5 |
| 65 | 290 | 340 | 690 | 113 | 34,0 | 49,0 |
| 80 | 310 | 380 | 828 | 140 | 51,0 | 65,0 |
| 100 | 350 | 430 | 850 | 154 | 80,0 | 91,0 |
| 125 | 400 | 715 | 210 | 130,0 | 155,0 | |
| 150 | 480 | 720 | 235 | 180,0 | 190,0 | |
| 200 | 600 | 950 | 285 | 320,0 | 385,0 | |
Specifications
Body Material
Cast steel
GP240GH
(GS-C25,1.0619))
Body design conditions
| PN16 | PN25 | PN100 | |
| Max. design pressure (MPa) PMA | 4,0 | 6,3 | 10,0 |
| Max. design temperature (℃) TMA | 400 | 400 | 400 |
| Max. operating pressure (MPa) PMO | 2,8 | 4,0 | 6,4 |
| Max. operating temperature (℃) TMO | 400 | 400 | 400 |
Pressure - Temperature rating
| PN | Temperature ℃ | |||||||
| -10･･･+50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | |
| Pressure MPa | ||||||||
| PN16 | 4,0 | 3,7 | 3,5 | 3,1 | 2,8 | 2,6 | 2,4 | 2,3 |
| PN25 | 6,3 | 5,9 | 5,5 | 4,9 | 4,5 | 4,1 | 3,8 | 3,6 |
| PN100 | 10,0 | 9,3 | 8,7 | 7,8 | 7,1 | 6,4 | 6,0 | 5,8 |
Secondary pressure ranges
Secondary pressure range | DN15-DN40 | DN50 | DN65 | DN80 | DN100 | DN125-DN200 |
| MPa | Spring number per size | |||||
| 0,05-0,1 | 6 | 26 | 26 | 37 | 37 | On request |
| 0,1-0,16 | 5 | 25 | 25 | 36 | 36 | |
| 0,16-0,25 | 4 | 24 | 24 | 35 | 35 | |
| 0,25-0,4 | 3 | 23 | 23 | 34 | 34 | |
| 0,4-0,63 | 2 | 22 | 22 | 33 | 33 | |
| 0,63-1,0 | 1 | 21 | 21 | 32 | 32 | |
Secondary pressure ranges higher than 1,6 MPa and lower than 0,05 MPa on request available.
Capacity Chart
