Sleeve for Line Mounting - Flow Control Valves - Throttle

FO

RE18316-09-02(2023-11-27)
Description

This line mounted restrictor throttles and limits the flow from B to A; it has an adjustable built-in restriction which can be tuned by rotating the external pinecone-type knurled sleeve from fully closed to fully open. Flow will increase by rotating the sleeve toward (+) direction. Once the desired adjustment is achieved, the sleeve can be locked by tightening the knurled ring nut (H) in order to prevent inadvertent changes or motion due to line vibrations. The maximum adjustment stroke is identified as K and, for different valve sizes, is shown by the specific table. This valve is a variable adjustable restriction, non-pressure-compensated: the actual flow through the valve will be determined by the pressure differential available between inlet B and outlet A, and also by the oil viscosity. Unrestricted reverse flow from A to B is permitted through a poppet type check valve, with cracking pressure 0,5 bar (7 psi) regardless of valve adjustment. The valve is available in different sizes for different flow ranges, as specified by the tables of the Technical data and Dimensions.

Minor leakage “B-A” can be expected with valve fully closed

Free reverse flow “A-B” is always allowed through the incorporated poppet check valve with 0.5 bar cracking pressure.

With valve fully closed, max admitted pressure: 250 bar.

Steel body, zinc plated

General:
Code:
  • Pressure P max bar (psi)
FO 13:
  • 350 (5000)
FO 19:
  • 250 (3600)
FO 25:
  • 250 (3600)
FO 32:
  • 250 (3600)
RE18316-09-dim(2023-11-27)
Code
Ports size A-B
Ø D mm (inches)
L mm (inches)
K mm (inches)
FO 13
G 1/2
48 (1.89)
86 (3.39)
8 (0.32)
FO 19
G 3/4
55 (2.17)
103 (4.06)
11 (0.43)
FO 25
G 1
79 (3.11)
123 (4.84)
12 (0.47)
FO 32
G 1-1/4
79 (3.11)
143 (5.63)
11.1 (0.44)

Advantages

  • Compact design and inline mounting for space saving.
  • Five sizes provide great adaptability to the system.
  • Easiness of adjustment.
  • Mounting position is unrestricted
  • Low Δp in the free flow direction

The FO Series valve is a fully and easily adjustable non-compensated flow control which can be employed for meter-in (Port A connected to the actuator inlet) or meter-out (Port B connected to the actuator outlet in order to control the oil flow from the actuator). The easiness of installation and of adjustment make it suitable for many circuits and many applications where a non-compensated flow control is desired.

RE18316-09-order(2023-11-27)

Cracking pressure (free flow) is always 0.5 bar (7.25psi)