Page 239 - Schroeder - Hydraulic And Lube Filtration

Medium Pressure Filter RLD

Type Fluid Appropriate Schroeder Media Fluid IRF
®
Petroleum Based Fluids All Z-Media (synthetic) Compatibility TF1
High Water Content All Z-Media (synthetic)
®
®
Invert Emulsions 10 and 25 µ Z-Media (synthetic) KF3
Water Glycols 3, 6, 10 and 25 µ Z-Media (synthetic)
®
KL3

LF1–2"

Element Element selections are predicated on the use of 150 SUS (32 cSt) Element MLF1
Pressure Series Part No. petroleum based fluid and a 102 psi (7 bar) bypass valve. Selection
Based on RLD
25DNZ3 & 40DNZ3 25DNZ3 40DNZ3 Flow Rate
To Z- 25DNZ6 & 40DNZ6 25DNZ6 40DNZ6
350 psi ® GRTB
(24 bar) Media 25DNZ10 & 40DNZ10 25DNZ10 40DNZ10
25DNZ25 & 40DNZ25 25DNZ25 40DNZ25 MTA
gpm 0 20 40 60 80 100
Flow
(L/min) 0 50 100 150 250 380 MTB
Shown above are the elements most commonly used in this housing.
ZT

KFT

Pressure RT
∆P housing ∆P element
Drop
RLD ∆P housing for fluids with sp gr = 0.86: ∆P element = flow x element ∆P factor x viscosity factor Information RTI
El. ∆P factors @ 150 SUS (32 cSt): Based on
Flow Rate
25DNZ3 .28 40DNZ3 .18 and Viscosity LRT
25DNZ6 .18 40DNZ6 .11
25DNZ10 .12 40DNZ10 .07 ART
25DNZ25 .09 40DNZ25 .06

If working in units of bars & L/min, divide above factor BFT
by 54.9.
Viscosity factor: Divide viscosity by 150 SUS (32 cSt).
QT

KTK
sp gr = specific gravity
Sizing of elements should be based on element flow information provided in the Element Selection chart above. LTK

Notes ∆P filter = ∆P housing + ∆P element MRT
Exercise:
Determine ∆P at 40 gpm (150 L/min) for 40DNZ6 Accessories
using 200 SUS (44 cSt) fluid. for Tank-
Solution: Mounted
∆P housing = 5.0 psi [.34 bar] Filters
∆P element = 40 x .11 x (200÷150) = 5.9 psi
or
= [150 x (.11÷54.9) x (44÷32) = .40 bar] PAF1
∆P total = 5.0 + 5.9 = 10.9 psi
or MAF1
= [.34 + .40 = .73 bar]

MF2

SCHROEDER INDUSTRIES 237