Yoshitake DP-100 series pilot-operated solenoid valves are high-precision valves featuring a stainless steel (SCS14A) body and PTFE valve disc. The DP-100 series provides three times more durability and scale resistance than conventional models thanks to its Anti-Sticking Mechanism (ASM). It is suitable for various clean fluids including steam, air, cold and hot water, nitrogen, carbon dioxide, argon, and low-viscosity oil.

Features

• Ultra-high performance technology gives high precision in performance.
• Three-times more durability than conventional models.
• ASM (Anti-Sticking Mechanism) for three-times more scale resistance.
• Body and main parts made of stainless steel give higher corrosion resistance, making it usable for clean fluids.
• A combined internal component enables easy cartridge replacement with this product installed.
• Improve air tightness by adopting PTFE gasket.
• Usable for wide pressure range of 0-1.0 MPa (0.03-1.0 MPa if the coil is sideways).
• Horizontal and vertical installation (within 90 degrees from upward position of the coil).

Specifications

Specification	Details
Structure	Pilot-operated piston type
Application	Steam, Air, Cold and hot water, N2 gas, CO2 gas (dry), Ar gas, Oil (20 cSt or less)
Working Pressure	0-1.0 MPa (unusable under vacuum)
Min. Differential Pressure	0 MPa (0.03 MPa or more is required for vertical installation)
Allowable Valve Seat Leakage	50 mL/min under standard conditions (at air pressure of 0.6 MPa)
Temperature Range	5-180°C (no freeze condition)
Ambient Temperature	50°C or less (no freeze condition)
Installation Posture	Vertical or horizontal installation (within 90 degrees from upward position of the coil)
Material: Body / Piston	Stainless steel (SCS14A)
Material: Valve Disc	PTFE

Recommended Application

Recommended to use DP-200, DP-200F for cold and hot water applications.

Specifications of Coil

Specification	Details
Rated Voltage	AC 100/200 V or AC 110/220 V selective type (50/60 Hz common)
Allowable Fluctuation	Rated voltage -5% to +10%
Insulation Class	Insulation class H
Protective Structure	Dust tight, Splash proof
Ingress Protection	IP64 (JIS C0920)
Insulation Resistance	50 MΩ and more / 500 V megger

Dimensions and Weights

DP-100, DP-100-C (Screwed Type)

DP-100F, DP-100F-C (Flanged Type)

Nominal Size Selection

Selection Chart (For Steam)

When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2), and steam (saturated steam) flow rate (W) are 0.5 MPa, 0.3 MPa, and 800 kg/h, respectively, first find the intersection point of P1 = 0.5 MPa and P2 = 0.3 MPa. Trace down vertically from this intersection point to find the intersection point with W = 800 kg/h. Since this intersection point lies between nominal sizes 25A and 32A, select the larger one, 32A.

Selection Chart (For Water)

When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2), and flow rate (V) are 0.5 MPa, 0.3 MPa, and 300 L/min, respectively, first find the intersection point of the differential pressure before and after the valve (∆P = 0.5 - 0.3 = 0.2 MPa) and V = 300 L/min. Since this intersection point lies between nominal sizes 25A and 32A, select the larger one, 32A.

Operation

Normally Closed Type (DP-100, DP-100F, DP-100-D, DP-100F-D)

Opening operation (Power ON) When the power is turned ON, the coil is excited and pulls up the plunger, to open the pilot valve. Next, the pressure at the upper part of the valve drops since it flows to the outlet through the pilot port. The valve is then lifted up to the open position by the inlet pressure.

Closing operation (Power OFF) When the power is turned OFF, the coil excitation is canceled and the plunger drops down by force of the kick spring, to close the pilot valve. The pressure at the upper part of the valve rises due to the incoming inlet pressure from the bleed port which is communicated with the inlet. With the support of the kick spring, this makes the valve pushed down to the closed position.

Normally Open Type (DP-100-C, DP-100F-C)

Opening operation (Power OFF) When the power is turned OFF, the coil excitation is canceled and the pilot valve and plunger are lifted up by force of the lift spring, to open the pilot valve. The pressure at the upper part of the valve drops due to the outgoing pressure toward the outlet through the pilot port. This makes the valve lifted up to the opened position by the inlet pressure.

Closing operation (Power ON) When the power is turned ON, the coil is excited and pulls down the plunger, to close the pilot valve. The pressure at the upper part of the valve rises due to the incoming inlet pressure from the bleed port which is communicated with the inlet. With the support of attractive force of the plunger, this makes the valve pushed down to the closed position.