Contact Us
ABOUT PRODUCTS NEWS DOWNLOAD SEND INQUIRY APPLICATIONS CONTACT US
FD Check-Q-Meter Valve Rexroth Interchangeable

Check-Q-Meter Valve FD 25

MANUFACTURER Genuine Huade Hydraulic
STANDARDS ISO 4401 / DIN 24340
AVAILABILITY Factory Direct Stock
Check-Q-Meter Valve FD 25
Check-Q-Meter Valve FD 25 - Image 2
Check-Q-Meter Valve FD 25 - Image 3
Check-Q-Meter Valve FD 25 - Image 4
TECHNICAL REPLACEMENT NOTICE

This Huade® directional control valve serves as a 100% direct drop-in replacement for Bosch Rexroth CHECK-Q-METER-VALVE-FD-25 equivalents. Dimensions, mounting interfaces, and technical parameters are identical. Designed for cost reduction in industrial and mobile hydraulic systems.

• Product features: By-pass valve, free-flow in opposite direction

• Specifications: FD 25 series,

• Applications:By-pass valve, free-flow in opposite direction

Request B2B Quote

Submit your target quantity and technical questions. Our hydraulic engineering team will provide a factory-direct quote and lead time estimate within 24 hours.

Send Product Inquiry → 📥 Download PDF Datasheet
💬 WhatsApp: +86-18217786775
✓
100% Genuine Huade Direct factory authorized supply
✓
ISO 4401 Mounting ISO 4401 / Rexroth interchangeable
✓
Secure Packaging Sealed rust-proof global shipping

Technical Data Sheet

  • Product Overview
  • Features & Applications
  • Technical Parameters

Product Overview

Check-Q-meter valve FD 25 is a special valve device, which is mainly used to maintain the flow balance in the hydraulic system and ensure the stable operation of the system. The reason why Huade® FD 25 check-Q-meter valves win wide user trust is mainly due to its high quality and relatively lower price. The packaging of the products can be customized, such as standard carton packaging, wooden box packaging, plywood box packaging, plastic waterproof packaging, etc.

Pilot pressure, port X (flow control range) (MPa)

Setting pressure for secondary pressure relief valve (MPa)

80 (size12) 200 (size16) 320 (size25) 560 (size32)

poppet seat area/area of pilot spool=1/20

Mineral oil(for NBR seal),or phosphate ester(for FPM seal)

Key Features

  • Porting pattern to DIN 24 340, from D,ISO 5781 and CETOP - RP 121H
  • Pilot operated check valve, leak-free. The check-Q-meter controls the returning flow Q2 in relation to the flow being directed into the opposite side of the actuator Q1 with cylinders the area ratio ( Q2=Q1φ ) has to be taken into account.
  • By-pass valve, free-flow in opposite direction
  • Optional built-in secondary pressure relief valve (only for valve with flange connections).

Industrial Applications

  • Check-Q-meters valves FD25 are used in hydraulic systems to influence the speeds of hydraulic motors and cylinders independent of the load (prevents running away). In addition there is an isolated function for pipe burst safety.
  • The check-Q-meter comprises basically of the housing (1), main poppet (2), pilot part(3), pilot spool (4), damping spool(5) and pilot damping (6).
  • Structure of FD Check-Q-Meter Valve
  • Symbol of FD Check-Q-Meter Valve  
  • Circuit examples
  • Note:
  • Two check-Q-meters cannot be used to control two cylinders which are forced mechanically to move together, as synchronization and the same pressure cannot be guaranteed in each cylinder.
  • Therefore, the cylinders have to be equipped with two pilot operated check valves, type SL.The check-Q-meter is fitted in a common line.
  • In this case, the load pressure must not exceed 20MPa!

Technical Parameters

Mechanical ratings and operating limits for the Check-Q-Meter Valve FD 25:

Parameter / Dimension Name Value / Rating Specification
Operating pressure, ports A, X (MPa) to 31.5
Operating pressure. port B (MPa) to 42
Pilot pressure, port X (flow control range) (MPa) min.2to3.5, max.31.5
Cracking pressure, A to B (MPa) 0.2
Setting pressure for secondary pressure relief valve (MPa) to 40
Flow (L/min) 80 (size12) 200 (size16) 320 (size25) 560 (size32)
Area ratio of the pre-opening poppet seat area/area of pilot spool=1/20
Pressure fluid temperature range(℃) -30 to+80
Viscosity range(mm ²/s) 10 to 800
Pressure fluid   Mineral oil(for NBR seal),or phosphate ester(for FPM seal)

Related Products