Yoshitake PD-1 is an air-operated valve usable for air, water, oil, and steam applications. Designed to prevent chattering by closing against the fluid flow direction, it ensures stable and reliable performance across various industrial environments. The valve comes in standard air-to-open operation (with air-to-close available) and features a highly durable stainless steel valve seat alongside a synthetic rubber diaphragm.

Features

1. Usable for air, water, oil and steam.
2. No chattering due to closing action against the flow direction of fluid.
3. Excellent durability of stainless steel valve seat.
4. Excellent durability of synthetic rubber diaphragm.

Note

For air operated pressure reducing valve, please refer to the block P. -10 (GD-37UN standard unit for operation or GD-37N pressure reducing valve). For 3 way solenoid valve, please refer to the block P. -11 (DD-37 3way solenoid valve).

Specifications

Model	PD-1	PD-2
Application	Steam, Air, Cold and hot water, Other non-dangerous fluids	Steam, Air, Cold and hot water, Other non-dangerous fluids
Working pressure	0-1.0 MPa	0-1.0 MPa
Max. temperature	180°C	180°C
Operation	Air-to-open	Air-to-open
Pilot pressure	0.2-0.25 MPa	0.2-0.25 MPa
Material (Body)	Bronze	Cast iron
Material (Valve)	Stainless steel	Stainless steel
Material (Valve seat)	Stainless steel	Stainless steel
Connection	JIS Rc screwed	JIS 10K FF flanged

Available with air-to-close operation type.

Dimensions (mm) and Weights (kg)

PD-1

Nominal size	d	L	H	H1	Cv value	Weight
15A	Rc 1/2	90	210	50	5	4
20A	Rc 3/4	100	221	56	7	4.4
25A	Rc 1	110	221	56	11	4.7

PD-2

Structure is a little different depending on size.

Nominal size	L	H	H1	φA	Cv value	Weight
15A	120	210	50	140	5	5.9
20A	130	221	56	140	7	6.6
25A	140	221	56	140	11	8.1
32A	180	412	100	256	16	28.5
40A	180	412	100	256	24	29.0
50A	180	422	105	256	40	30.0

Parts and Materials

No.	Part Name	Material
24	O Ring	EPDM
23	Rivet	Brass
22	Name Plate	Stainless Steel
20	Bolts	Rolled Steel
19	Spring Washer	Carbon Steel
18	Bolt	Carbon Steel
17	Diaphragm Cover	Cast Iron
16	Diaphragm	EPDM
15	Diaphragm Plate	Carbon Steel and Rolled Steel