Yoshitake DBFV-1S is an electric butterfly valve designed with a stainless steel body and a double-eccentric structure that provides excellent sealing and long service life with minimal seat wear. The integrated electric actuator features built-in thermal and torque protectors, ensuring safe and reliable operation across various industrial applications.

Features

• Stainless Steel Body: Durable construction suitable for steam, air, water, oil, and other non-hazardous fluids.
• Double-Eccentric Structure: Provides excellent sealing and minimizes seat wear for a longer service life.
• Advanced Electric Actuator: Built-in thermal protector and torque protector safeguard the motor.
• Anti-Condensation: Built-in space heater prevents internal condensation.
• Manual Operation: Manual override is possible for all actuator sizes.

Specifications

Valve Specifications

Feature	Specification
Model	DBFV-1S
Size	50-150A
Application	Steam, air, hot and cold water, oil, and other non-hazardous fluids
Body, Cap Material	Stainless steel
Disc Material	Stainless steel
Seat Material	PTFE
Connection	Wafer (Applicable flange standards: JIS 10K, ANSI 150lb and EN PN16)
Piping Orientation	Horizontal or Vertical (inverted horizontal is not allowed)
Actuator Model	50A, 65A, 80A: DA50 100A: DA80 125A, 150A: DA200

Electric Actuator Specifications

Feature	DA50	DA80	DA200
Voltage	AC100V, AC200V, AC220V
Frequency	50/60Hz
Ambient Temperature	-25 to 70°C
Operation	ON-OFF, 90° bi-directional rotation
Feedback Signal	Fully open/closed position feedback (Contact capacity: 5A at AC250V)
Working Time	Short-time duty 15 min
Insulation Class	Class F
Protection	IP67
Body Material	Aluminum alloy
Compatible Cable Diameter	6 to 12mm	6 to 12mm	10 to 14mm
Cable Gland Connection	PG13.5	PG13.5	PG16
Mounting Standard	ISO5211 (F03/F05/F07)	ISO5211 (F07/F10)	ISO5211 (F07/F10)
Torque (N·m)	50	80	200
Travel Time (50Hz / 60Hz)	15s / 13s	22s / 18s	39s / 33s
Power Consumption (W)	10	10	40

Dimensions

Size	L	L1	H	Weight (kg)
50A	43	18	375	7
65A	49	22	390	8
80A	49	22	400	8.5
100A	54	23	442	11
125A	56	24	536	20.5
150A	56	24	558	23.5

Installation

WARNING

• This product cannot be used as an emergency shut-off valve. If used in such systems, ensure that other reliable safety measures are implemented.
• Do not use in locations or atmospheres where explosive gases may accumulate. This product is not explosion-proof.
• Always turn off the power before making any electrical connections to avoid electric shock.

Installation Posture

The installation posture can be either horizontal or vertical, but ensure that the actuator is not installed upside down. This may cause malfunction.

Piping Precautions:

1. Use sheet gaskets when connecting the valve to pipes. Using other types of gaskets (like vortex or metal gaskets) may cause fluid leaks.
2. Always install a strainer (80–100 mesh) on the inlet side of the product to prevent foreign objects or scales from entering.
3. Avoid installing the product at a location where the flow is uneven, such as near the discharge outlet of a pump, outlet of an elbow, downstream side of a reducer, or outlet side of a control valve. If unavoidable, spare a distance of about 5 times the nominal size.

Electrical Wiring

1. Loosen the bolts of the protective cover with a 4mm hex wrench and remove the cover.
2. Loosen the nut of the cable gland and remove the rubber stopper. Insert the wiring cable through the cable gland and connect it to the terminal block according to the wiring diagram.
3. Wire the ground terminal. (The ground terminal is located away from the terminal block).
4. Tighten the nut of the cable gland after wiring.
5. Perform a trial operation of the actuator and check if the direction of operation and limit switches are working properly.

Maintenance and Troubleshooting

To maintain the product's functionality and performance, perform regular inspections approximately once a year. Check for abnormal sounds, external leaks, and verify that control and feedback signals are accurate.

Manual Operation

For DA50, the actuator can be manually operated using the operating shaft at the bottom of the actuator with a wrench. For DA80 and DA200, manual operation is possible with a handle.

Troubleshooting Guide

Fault	Cause	Countermeasure
External leak from the gland part	Nut is loose.	Tighten nut. If the leak does not stop, replace the product.
Seat leakage	Seat or Disc is damaged; Foreign object caught.	Replace the product; Remove the foreign object.
Actuator not operating	No power supply; No input signal; Wire disconnected; Motor thermal protector activated.	Check supply voltage/input signal; Securely connect wire; Wait for motor to cool down.
Stops at intermediate position	Increased valve torque due to foreign objects, causing protection circuit to activate.	Operate manually, and if the valve torque doesn't decrease, clean the valve.
No feedback signal	Wire disconnection or poor contact.	Check if the wiring is done according to the wiring diagram.