Polyhydron CI20SA Pilot Operated Check Valve

Polyhydron CI20SA Pilot Operated Check Valve 

 

Discription 

 

Pilot Operated Check valve models CI **** Allow Free Flow In The Direction From Port A To Port B And Offer Leak Free Closure In Opposite Direction.

Reverse Flow Can Be Achieved By Applying Pilot Pressure To Its Port X.

The Pilot Pressure Required At Port X To Achieve Reverse Flow From Its Closed Position Can Be Calculated Using The Formulae Given In The Technical Specifications.

Generally, To Achieve Smooth Decompression Of Oil In A Hydraulic Actuator Prior To Reverse Flow, It Is Essential To Keep The Pilot Pressure As Close To The Calculated Value As Possible And The Flow controlled.

 

Technical specifications

Construction	Seat Type Valve, With Decompression Facility.
Mounting style	Threaded Port Or Subplate Mounting
Mounting Interface	Sub-Plate Mounting - As Per ISO 5781. Threaded Port Body - Factory Standard.
Mounting position	Optional.
Flow Direction	Free Flow From A To B
	Piloted Flow from B To A.
Cracking Pressure	1 Bar
Working pressure Area ratios	315 Bar For Ports A, B And X.
	Pilot Piston : Decomp. Poppet
	Pilot Piston : Main Poppet
Hydraulic medium	Mineral Oil.
Temperature range	-20°C to + 80°C.
Viscosity range	10 CSt To 380 CSt.
Fluid cleanliness required	ISO 4406 20/18/15 Or Better

Max. Flow Handling Capacity	Size	10        20        30
	l/min	80        160      350
Mass Approx	Model	CI10S CI10S CI20S CI20T CI30S CI30T
	in Kg	1.9       2.2     3         3.3      5.8      6

Formulae For Pilot Pressure Required At Port X Open The Valve For Flow From Port B To Port A

To open Decompression Poppet	Type A	Type B
	>PA + PB/16 + 0.5	>PA/1.5 + PB/4 + 2
To Open The Main Poppet	>PA/2 + PB/2 + 0.5	>2PB - PA + 2
Where, PA = Pressure at Port A And PB = Pressure At Port B , When The Flow Occurs.