Fushiman PMD31 Pressure Reducing Valves

Manufacturer: Fushiman Co.,LTD.
Model: PMD31

Model	Nominal Diameter	Primary Pressure	Secondary Pressure Range	Maximum Operating Temperature	Body Material	Connection
PMD31	15〜150	MAX. 1.0MPa	0.035～0.7MPa	80℃	FC, SCPH, SCS	Flange

The direct-acting pressure reducing valve ensures stable operation.
Since it adopts a primary pressure balance method, the secondary pressure is hardly affected by fluctuations in the primary pressure.
The valve body uses synthetic rubber, ensuring good sealing performance when the valve is closed.
If the flow rate is low, please use the PPD41B-3 type pressure reducing valve (nominal diameter 15–25).

Specifications and Materials

Fluid	Pressure MPa		Temperature ℃	Nominal Diameter	Main Component Materials				Pipe Connection
Fluid	Primary Side	Secondary Side Setting Range	Temperature ℃	Nominal Diameter	Valve Box Spring Protection Tube	Valve Body Diaphragm	Valve Seat/Liner Guide Bush	Valve Stem	Pipe Connection
Air and Other Non-Corrosive Gases	0.055 1.0	0.035〜0.3 0.2〜0.7	0 〜 80	15〜25 (1) 32〜80	Cast Iron	Synthetic Rubber	Bronze	Stainless Steel	Flange JIS 10K Full Face
		0.035〜0.3 0.2〜0.55		100
		0.035〜0.4		125-150

Note (1): Normally, the PPD41B-3 type pressure reducing valve is used (for economic reasons), but if its capacity is insufficient (when it reaches the maximum flow limit), this valve is used instead.

Remarks:

The valve casing can also be made of cast bronze or stainless steel cast bronze. In this case, ASME Class 150 can also be manufactured.
The connection parts can be made without rubber or brass if required.
Products exceeding the secondary pressure setting range can also be manufactured.

Performance

Reduction Ratio	Refer to the setting range diagram
Minimum Settable Differential Pressure	0.02 MPa
Offset	Less than 10% of the maximum set pressure
Tight Shutoff Pressure Increase	0.01–0.02 MPa
Minimum Adjustable Flow Rate (Air) (2)	5–10 m³/h (Standard Conditions)
Seat Leakage	Less than 0.01% of the rated flow rate

Note (2): For gases other than air, divide by √G (where G is the specific gravity of the gas, with air as 1).

Cv Value

Nominal Diameter	15	20	25	32	40	50	65	80	100	125	150
Cv	1.8	2.6	3.9	6.3	8.3	13	21	29	50	76	109

Structure and Dimensions

Nominal Diameter 15–50	Nominal Diameter 65–100	Nominal Diameter 125・150

Dimensions and Mass

(mm, kg)

Nominal Diameter	Valve Body: Cast Iron					Valve Body: Cast Bronze or Stainless Steel Cast Bronze
Nominal Diameter	L	H1	H2	E	Mass	L	H1	H2	E	Mass
15	196	70	318	155	12	206	70	318	155	16
20-25	200	70	318	155	13	210	70	318	155	17
32	175	70	318	155	14	220	70	318	155	18
40	190	80	328	155	16	220	80	328	155	21
50	195	80	328	155	17	225	80	328	155	22
65	230	104	429	210	34	280	109	429	210	38
80	250	104	429	210	35	280	109	429	210	39
100	290	127	466	250	58	330	121	471	250	65
125	365	174	612	320	98	380	174	612	320	114
150	415	207	792	380	159	470	207	792	380	170

Disassembly and Maintenance Space Required

(mm)

Nominal Diameter	Upward from Pipe Center	Downward from Pipe Center
15〜32	470	190
40-50	480	200
65-80	590	340
100	650	400
125	930	450
150	1220	550

Fushiman Co.

Specifications and Materials

Performance

Cv Value

Structure and Dimensions

Disassembly and Maintenance Space Required

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