Yoshitake PF-7000 is a high-performance mechanical pumping trap designed for condensate recovery in industrial steam systems. Utilizing steam or air pressure as the driving force, it eliminates the need for electrical components and motors, making it suitable for hazardous environments and energy-saving applications. Its automated operation ensures efficient condensate transfer from receiver tanks to recovery lines with minimal running costs.

Key Features

• Energy Efficient: Uses inexpensive steam or air pressure; gas is consumed only during the pumping cycle.
• Simplified Maintenance: Main internal components are attached to the cover set, allowing for on-line inspection and part replacement without removing the body from the piping.
• Automated Operation: Requires no manual intervention once commissioned.
• Robust Construction: Features a durable ductile cast iron body and stainless steel internal trim for long service life.

Technical Specifications

Item	Specification
Model	PF-7000
Nominal Size	25A, 40A, 50A, 80A
Max. Driving Pressure	0.8 MPa
Max. Temperature	180°C
Motive Fluid	Steam or Compressed Air
Body Material	Ductile Cast Iron (FCD450)
Internal Trim	Stainless Steel

INFO

The most appropriate driving pressure is typically the back pressure at the outlet side plus 0.1 to 0.2 MPa. For sizes 25A to 50A, the inlet and outlet sizes match the nominal size; for 80A, the inlet is 80A and the outlet is 50A.

Dimensions and Weights

Size	d1 (Inlet)	d2 (Outlet)	L (Height)	Weight (kg)
25A	Rc 1	Rc 1	544	92
40A	Rc 1-1/2	Rc 1-1/2	549	92
50A	Rc 2	Rc 2	525	91
80A	Rc 3	Rc 2	500	90

Note: Motive fluid port is Rc 1/2; Vent port is Rc 1.

Internal Structure and Operation

1. Inflow Stage: Condensate enters the body through the inlet. As the level rises, the stainless steel float [9] moves upward. The vent valve [4] is open, and the inlet valve [6] is closed.
2. Discharge Stage: When the float reaches the trip point, the vent valve closes and the inlet valve opens. Motive pressure (steam/air) enters the body, pushing the condensate out through the discharge port.
3. Reset Stage: As the level drops, the float moves down, closing the inlet valve and re-opening the vent valve to release internal pressure and restart the cycle.

Installation Guidelines

Proper piping is critical for optimal performance. The PF-7000 requires external check valves (typically SCV-2 or SCV-3) at both the inlet and outlet.

• Receiver Tank: A tank must be installed before the pumping trap to separate flash steam and provide temporary storage.
• Flow-in Height: Recommended condensate flow-in height is 1,000 mm or more above the bottom of the unit.
• Piping: Ensure all connections are firm. Flange joints are recommended for easy removal during maintenance.

WARNING

Condensate may blow out from the vent port if driving pressure drops or fails. Always pipe the vent port to a safe location.

Maintenance and Spare Parts

Regular inspection is recommended to ensure long-term reliability. Consumable parts including the vent valve P [4], inlet valve P [6], and float [9] should be inspected every 2 years or 120,000 cycles.