E .0/12.10
114
Pressure Relief Valve
Spool Type, Direct Acting
with Spring Chamber Venting
Cartridge – 350 bar
DB16621E-10
z Pressure relief function with external venting of spring chamber
z Good, at curve characteristics throughout the ow range
z All exposed surfaces zinc-plated and corrosion-proof
z All valve parts made of high-strength steel with hardened and ground components to
ensure minimal wear and extended service life
z Low pressure drop due to CFD optimized ow-path
z Adjustable across entire pressure range
z Can also be used as a logic element or bypass valve
z Piston orice available as an option
Operating pressure: max. 350 bar
Spring force: max. 16 bar
Nominal ow: max. 300 l/min
Media operating temperature range: min. -20 °C to max. +100 °C
Ambient temperature range: min. -20 °C to max. +100 °C
Fluid: Hydraulic oil to DIN 51524 Part 1 + 2
Viscosity: min. 7.4 mm²/s to max. 420 mm²/s
Filtration: Class 21/19/16 to ISO 4406
or cleaner
MTTF
d
: 150 years
Installation: No orientation restrictions,
preferably horizontal
Materials: Valve body: high tensile steel
Piston: hardened steel
Seals: FKM (standard)
NBR (optional, temperature
range to -30 °C)
Back-up rings: PTFE
Cavity: 16621
Weight: 0.386 kg
The DB16621E is a direct acting, spool
type pressure relief valve with additional
spring-chamber venting. When the
pressure at port 1 exceeds the pre-set
value, the piston opens and oil ows from
port 1 to tank port 2. When the valve
opens, the leakage bore to port 2 is shut-
off. The additional spring chamber venting
at port 3 to tank ensures that the valve is
independent of pressures at port 2.
Up to 300 l/min
Up to 350 bar
E .0/12.10
115
Pressure relief valve,
metric
16621 = 3-way cavity
10 = standard
C = cartridge only
*Combinations with body on request
V = FKM (standard)
N = NBR (optional)
:
16 = up to 16 bar
V = adjustable with tool
F = factory preset, not adjustable
Metric 16621
DB16621E-01-C-V-16F 3147711
Other models on request
R16621-01X-01 3477778 steel G1“, G1/4“ 420 bar
SEAL KIT 16621-FKM 3178282
SEAL KIT 16621-NBR 3506920
In preparation
Relieving pressure [bar]
Flow [l/min]
tting depth
tting depth
Justus-von-Liebig-Str.
Tel: 0 68 97 / 509-01
Fax: 0 68 97 / 509-598
E-Mail: utec@hydac.com
The information in this brochure relates to
the operating conditions and applications
described.
For applications or operating conditions
not described, please contact the relevant
technical department.
Subject to technical modications.
Measured at n = 33 mm²/s, T
oil
= 46 C
Millimeter
Subject to technical modications
Millimeter
Subject to technical modications
hex SW38 metric
torque 130
+20
Nm
