Flow Control Valves

FD50-45 — Flow Divider / Combiner, Multi-Function, High Pressure
  Selection guide - similar valves.
  Application and Selection Notes.
  PDF file of this page.
  STP file for FD50-45.
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FD50-45 Valve


FD50-44 Valve symbol
High performance, high pressure, multifunction, screw-in, cartridge-style, spool-type flow

In the dividing mode, the FD50-45 will divert input flow from port 3 to ports 2 and 4, based on
the ratio specified, regardless of operating pressure. When the flow direction is reversed the
valve will combine flows from 2 and 4 to port 3.
Synchronizing flow is provided in both the dividing and combining modes at “bottomed” conditions
in cylinder applications and at “stalled” conditions in motor applications.

• Hardened parts for long life.
• Quiet, modulated response.
• Wide operating flow range.
• Synchronizing in dividing and combining modes.
• Floating cage — high installation torque.
• Industry-common cavity.

Operating Pressure: 345 bar (5000 psi) maximum
Burst Pressure: 1103 bar (16000 psi)
Flow Range Options:
  Input Flow: 4 - 19 lpm (1 - 5 gpm); Ratio: 50:50; Model Code: 22
  Input Flow: 5.5 - 26.7 lpm (5 - 7 gpm); Ratio: 50:50; Model Code: 33
  Input Flow: 9.5 - 38 lpm (2.5 - 10 gpm); Ratio: 50:50; Model Code: 44
  Input Flow: 11.5 - 41.5 lpm (3 -11 gpm); Ratio: 50:50; Model Code: 55
  Input Flow: 15 - 45 lpm (4 -12 gpm); Ratio: 50:50; Model Code: 66
  Input Flow: 19 - 57 lpm (5 - 15 gpm); Ratio: 50:50; Model Code: 88
Flow Accuracy: 10% of inlet flow for Models 22, 33, 44, 55 and 66; 15% of inlet flow for Model 88.
Synchronizing Flow: Approximately 10% of maximum inlet flow
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
   -54° to 107°C (-65°F to 225°F) with Polyurethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
   7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
   Note: Standard 10 size 4-way bodies can be used with this product with Port 1 plugged.
   See page 8.010.1_4w for special flow divider bodies.
Cavity: VC10-4; See page 9.110.1_4w
Cavity Tool: CT10-4xx; See page 8.600.1
Seal Kit: SK10-4x-MMM; See page 8.650.1

Note: This new FD50-45 flow divider incorporates the features of the older FDxx-40,
FDxx-41 and FDxx-42 flow dividers in one product. It is designed to supersede the
older models. OEM’s are encouraged to consider this newer, more robust and versatile
model for new applications.




FD52-45 Flow vs. Pressure



FD52-45 Valve Dimensions



Cartridge: Weight: 0.10 kg (0.23 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups

Ported Body:
Ductile iron body required
for operation over 207 bar (3000 psi).
Aluminum bodies are available for lower
pressure operation. FD-type bodies
recommended but a standard 4-way body
may also be used with Port 1 plugged.
See page 8.010.1_4w.



FD50-45 Ordering