Miyawaki - Pressure reducing Valve - Pilot Operated for steam - RE3
■Operating principle
Changes in downstream pressure are sensed by the pilot valve mechanism (bellows connected with a pilot valve unit) through a signal line D, which connects the pilot valve regulator with the secondary pressure side.
Movement of the bellows will open or close the pilot valve, regulating the amount of steam influencing the movement of the piston, which will close or open the main valve, thus keeping downstream pressure on a stable level.
It can be used in a wide range of applications such as food industry, dyeing industry, cleaning industry, apparel industry, heating equipment and air conditioning equipment.
●Energy saving, the more you use it, the more it makes a difference.
micro bellows and a high-precision pilot valve ensures control. (Maximum primary pressure 1.6MPa, maximum pressure reduction ratio 20: 1)
●Excellent durability
Durability is outstanding due to the unique stainless steel micro bellows and overstress prevention mechanism.
- Max. Operating Pressure
- 1,6MPa
- Max. Operating Temperature
- 220℃
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.
Compact and cost effective design
It has a space saving (ultra small/lightweight). Low heat dissipation with superb energy saving properties and cost performance.
Superb durability
Offers superb durability thanks to an overstress prevention mechanism.
Pilot operated valves
The drive section detects the pressure supplied from the pilot chamber, and the degree of opening of the valve is adjusted to keep the pressure on the secondary side at a set level.
Simple pressure adjustment
Pressure adjustment can be performed by hand using a handle, with no tools required. (with lock mechanism)
Easy maintenance
It is easy disassembly and reassembly.
Uses
Suitable for a wide range of uses including devices for foodstuffs, dyeing, and cleaning as well as heating equipment and air conditioning equipment.
Dimensions/Weight
| Size | Dimensions (mm) | Dimensions (in) | Weight | |||||||||
| L | L1 | H1 | H2 | W | L | L1 | H1 | H2 | W | (kg) | (lb) | |
| 1/2” | 90 | 127 | 87 | 58 | 74 | 3.5 | 5 | 3.4 | 2.3 | 2.9 | 2,7 | 6.0 |
| 3/4” | 95 | 130 | 3.7 | 5.1 | 2,8 | 6.2 | ||||||
| 1” | 100 | 132 | 3.9 | 5.2 | ||||||||
| 1 1/4” | 130 | 155 | 111 | 73 | 96 | 5.1 | 6.1 | 4.4 | 2.9 | 3.8 | 6,2 | 13.7 |
| 1 1/2” | 6,3 | 13.9 | ||||||||||
| 2” | 140 | 157 | 121 | 79 | 110 | 5.5 | 6.2 | 4.8 | 3.1 | 4.3 | 8,3 | 18.3 |
Specifications
| odel | Connection | Max. operating pressure | Operating pressure range | Control pressure range | Values | Max. pressure reduction ratio | Max. operating temperature | Body material | ||||||
| Type | Size | (MPa) | (psig) | Primary side pressure (MPa) | Primary side pressure (psig) | Secondary side pressure (MPa) | Secondary side pressure (psig) | Cv | Kvs | (℃) | (℉) | |||
| RE3 | Screwed Rc,NPT | 1/2” | 1,6 | 232 | 0,1 - 1,6 | 14.5 - 230 | 0,034 - 1,2 | 4.9 - 174 | 0,8 | 0,7 | 20:1 | 220 | 428 | Brass C3771 |
| 3/4” | 1,9 | 1,6 | ||||||||||||
| 1” | 3,0 | 2,6 | ||||||||||||
| 1 1/4” | 4,9 | 4,2 | ||||||||||||
| 1 1/2” | 6,8 | 5,9 | ||||||||||||
| 2” | 12,0 | 10,3 | ||||||||||||
● Offset: up to 0,03MPa (4.4psig)
● Minimum differential pressure: 0,07MPa (10.2psig)
● Minimum adjustable flow rate: 5% of the rated flow rate
● Lockup pressure : 0,03MPa (4.4psig) or lower
Capacity Chart
● How to use the chart (example)
To reduce the pressure of 400kg/h (882lb/h) of steam from 1,2MPa to 0,7MPa (174psig to 102psig)
1. Find the point at which the primary side pressure 1,2MPa (174psig) curve and secondary side pressure 0,7MPa (102psig) horizontal line intersect.
2. Trace a vertical line from the point where they intersect, and look for the smallest-sized product where the steam flow rate is 400kg/h (882lb/h) or more at the point where the vertical line you have traced intersects the horizontal size lines.
3. In this case, the pressure reducing valve with a size of 1" is optimum.
Installation Examples
■Related Products Models for reference
Sight glass TS1, T3
Y strainer YM1, YSF
Separator H3, H5
Steam trap Differs depending on conditions
