Pressure-Relief Cartridge Valve, Size SAE 10 / NG 8
Q
max
= 20 gpm [75l/min],p
max
= 5000psi [350bar]
bi-directional,poppet type,adjustable
Series RVBD-10…
1/4
Reference: 520-P-030520-EN-00
Issue: 11.2020
S Screw-in valve acc. to ISO 17209 – Common Cavity
S Compact construction
S For common cavities: C1020, AX/C1020 – 7/8-14 UNF
S 3 pressure ranges available
S Adjustment screw can not be backed out of valve
S A unibody cage construction provides very low
hysteresis, dependable and reliable operation
S Hardened precision fitted poppet & cage provides
reliable long life
S Overset protection, spring can not go solid
S All external parts are zinc-plated for longer life
S All cartridges valves are 100% functionally tested
1 Description
Series RVBD-10… pressure-relief catridges are size SAE
10 / NG 8, high performance screw-in cartridges with a
7/8-14 UNF mounting thread. This cartridge is a bi-directio
nal pressure valve, is adjustable, has an extremely low
leakage and has a conical piston design. Due to the diffe
rential range the valve can also be used as a pressure con
trol valve. This valve relieves from port 1 to port 2 and port
2 to port 1. This valve provides a fast response, rugged, dirt
tolerant operation and has a good pressure vs. flow charac
teristics. All external parts of the cartridge are zinc plated
and are thus suitable for use in the harshest operating envi
ronments
2 Symbol
2
1
3 Technical data
General characteristics Description, value, unit
Designation pressure-relief cartridge
Design bi-directional, poppet type, adjustable
Mounting method screw-in cartridge 7/8-14 UNF
Tightening torque see chapter 5, dimensions & sectional view
Size SAE 10, cavity type C1020
NG 8, cavity type AX/C1020
Weight 0.38 lbs [0.17kg]
Mounting attitude unrestricted
Ambient temperature range -40°F … +248°F [-40°C … +120°C]
520-P-030520-EN-00/11.2020
Series RVBD-10…
2/4
Hydraulic characteristics Description, value, unit
Maximum operating pressure - ports 1, 2 5000psi [350bar]
Maximum flow rate 20 gpm [75l/min]
Nominal pressure ranges 1500, 3000, 5000 psi [105, 210, 350 bar]
For further pressure ranges, please contact BUCHER
Flow direction 1 → 2 pressure relieving
2 → 1 pressure relieving
Definition of opening visible at 0.06 gpm [0,25l/min]
Internal leakage 5 cu. in./min (85 cc/min) @ 85% of opening pressure
Hydraulic fluid HL and HLP mineral oil to DIN 51 524;
for other fluids, please contact BUCHER
Hydraulic fluid temperature range -13°F … +158°F [-25°C … +70°C]
Viscosity range 10…500mm
2
/s (cSt), recommended 15...250mm
2
/s (cSt)
Minimum fluid cleanliness
Cleanliness class to ISO 4406:1999
class 18/16/13
4 Performance graphs
measured with oil viscosity 33mm
2
/s (cSt)
520-P-030520-EN-00/11.2020
Series RVBD-10…
3/4
5 Dimensions & sectional view
1.75
(44.5)
1.28
(32.5)
1 1/16“ (27)
1)
MA =
3/4“ (19)
3.03
(76.96)
Tightening torque M
A
1)
Cavity type C1020 – AX/C1020
When fitted in aluminium
When fitted in steel
28…32 ft-lbs (38 - 43[Nm])
55…60 ft-lbs (74 - 81[Nm])
6 Installation information
IMPORTANT!
When fitting the cartridges, use the specified tigh
tening torque. No adjustments are necessary,
since the cartridges are set in the factory.
ATTENTION!
Only qualified personnel with mechanical skills
may carry out any maintenance work. Generally,
the only work that should ever be undertaken is to
check, and possibly replace, the seals. When
changing seals, oil or grease the new seals tho
roughly before fitting them.
Seal kit NBR no. SKN-1022
2)
Item Qty. Description
1 2 Backup ring ∅0,518x0,053x0,048 Inch
2 1 O-ring 014 ∅0,489x 0,070 FKM Inch
3 1 O-ring 910 ∅0,775x 0,097 FKM Inch
IMPORTANT!
2)
Seal kit with FKM (Viton) seals, no. SKV-1022
520-P-030520-EN-00/11.2020
Series RVBD-10…
4/4
7 Ordering code
RVBD = pressure-relief valve, bi-directional
10 = nominal size SAE 10 / NG 8
N = NBR (Nitrile) seals (standard)
V = FKM (Viton) seals
(special seals - please contact BUCHER)
S = adjustment screw (standard)
C = capped adustment screw
T = tamperproof
K = handknob
M = metal handknob
0 = cartridge only
06TA = line-mounting body SAE-6 aluminum
06TS = line-mounting body SAE-6 steel
08TA = line-mounting body SAE-8 aluminum
08TS = line-mounting body SAE-8 steel
15 = pressure stage 100 … 1500 psi
30 = pressure stage 750 … 3000 psi
50 = pressure stage 1500 … 5000 psi
(blank) = without pressure setting (standard)
/XX = factory pressure setting in “100 psi” (e.g. “/12” = 1200 PSI)
Ex.
N ---10RVBD 30
0
-
S - _
8 Related data sheets
Reference (Old no.) Description
520-P-000050 The form-tool loan program
520-P-000120 Cavity type C1020
400-P-040261 Cavity type AX/C1020
520-P-000121 Line-mounting body, 10 Series -2-way
E 2020 by Bucher Hydraulics, Inc., 2545 Northwest Parkway, Elgin, Illinois 60124, USA
www.bucherhydraulics.com/commoncavit
y
info.el@bucherhydraulics.com
All rights reserved.
Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The
information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual
improvement, we reserve the right to amend the product specifications contained in this catalogue.
Classification: 430.300.300.305.310.330