Pressure reducing valve - With Pulse line for liquids & gases - REAH20L-M | Miyawaki

Name: Pressure reducing valve - With Pulse line for liquids & gases - REA...
Brand: Miyawaki
SKU: Pressure reducing valve - With Pulse line for liquids & gases - REAH20L-M | Miyawaki

Miyawaki REAH20L-M Pressure Reducing Valve with Impulse Line for Liquids and Gases

The Miyawaki REAH20L-M is a direct-acting pressure reducing valve designed for compressed media such as air and inert gases, as well as incompressible media like water, oil, and similar process fluids. The downstream pressure is obtained via an impulse line and transmitted to the sensing chamber, where the valve mechanically adjusts the opening to maintain the set point.

Technical Data

Connection: Flanged, DIN standard.
Body Material: Cast steel G17CrMo 5-5 / 1.7357.
Body Classes: PN63 and PN100.
PMA: 6.3 MPa for PN63, 10.0 MPa for PN100.
TMA / TMO: 530°C.
PMO: 6.3 MPa for PN63, 10.0 MPa for PN100.
Maximum Pressure Reduction Ratio: 25:1.
Optional: Pressure gauge on the body.

Adjustment Ranges

Typical downstream pressure ranges are 0.05–0.1 / 0.1–0.16 / 0.16–0.25 / 0.25–0.4 / 0.4–0.63 / 0.63–1.0 MPa. Ranges below 0.05 MPa or above 1.0 MPa require technical confirmation of spring selection and sizing.

Applications

Used in high-temperature or high-pressure networks for compressed air, process gases, industrial water, oil, cleaning systems, and auxiliary production circuits. The impulse line is beneficial when control pressure needs to be measured at the actual downstream usage point, not immediately after the valve.

Selection Criteria

Sizing requires p1, p2, flow rate, temperature, medium, density/viscosity, line DN, Kvs, and allowable reduction ratio. Published Kvs tables differ between distributor and official Miyawaki pages, so Kvs must be confirmed in the final technical datasheet before ordering.

Standard (Options)

Connection (Options)

Flanged

Material (Options)

1.7357
Cast Steel
GS 17 CrMo 55

Pressure Rating (Options)

PN 63
PN 100

Description

Features

Pressure reducing valves for liquids and gases

The model REA20 is a direct acting pressure reducinf valve designed for use of compressible media, such as air and various gasses and for incompressible media such as water, oil and others.

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
	L	H	h
	PN63-100
15	210	315	82	1,8
20	230		66	3,2
25	230		66	5,0
32	260		81	7,9
40	260		83	13,0
50	300	477	100	20,0
65	340	520	113	34,0
80	380	648	140	51,0
100	430	670	154	80,0

Specifications

Body Material

Cast steel

G17Cr-Mo 5-5

(1.7357)

Body design conditions

	PN63	PN100
Max. design pressure (MPa) PMA	6,3	10,0
Max. design temperature (℃) TMA	530	530
Max. operating pressure (MPa) PMO	6,3	10,0
Max. operating temperature (℃) TMO	530	530

Pressure - Temperature rating

PN	Temperature ℃
	-10･･･+50	100	150	200	250	300	350	400	450	500	530
	Pressure MPa
PN63	6,3	6,3	6,3	6,3	6,2	5,7	5,3	5,0	4,8	3,8	2,2
PN100	10,0	10,0	10,0	10,0	9,8	9,1	8,4	8,0	7,6	6,1	3,5

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.