500 Aero Series
500 Aero Series
500 Aero Series
.5 - 150 PSIG
ADJUSTABLE
POPOFF & INLINE
RELIEF VALVES
• 100% Tested
OPEN
Technical Data When system pressure
overcomes spring force,
Materials of Construction poppet opens momentarily
exposing variable orifice
Body — 2024-T4/T351 or
between poppet and body to
6061-T6/T651 Aluminum, pass increasing flow with
303 or 316 Stainless Steel minimum pressure rise
O-Rings — Buna N, Ethylene Propylene, without blowdown.
Neoprene, Silicone,
Teflon® or Viton®
Spring — 302 Stainless Steel or RESEALING
17-7PH Stainless Steel Resilient seal automatically
establishes line of contact
Pressure Ratings with spherical seat. Seal
provides dead tight reseal
Operating Pressure — Vacuum to 200 PSIG very close to cracking
Inline Valve: pressure.
Proof Pressure — 400 PSIG (28 BAR)
Burst Pressure — Above 500 PSIG (34 BAR)
Temperature Range Valve Sizes
-320°F to +400°F; -196°C to +204°C 1/4" to 1-1/2"
Based on O-Ring Material, See Page 2
How To Order
D 520 A - 4DB - 10
Dimensions
VENT TO ATMOSPHERE INLINE
B
Dia.
Hex A
A Across
Flats
Hex Across
Flats
Reseal Characteristics
CRACKING PRESSURE LEAKAGE Ascending Pressure
Standard Seals & Silicone . . . . . . . . . . . . . . . . . 5 cc/min. Standard Seals . . . . . . . . . . . . . . . 0 to 95% of C.P.
Teflon® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.02 scfm Silicone (524) & EPR (562) . . . . . 0 to 80% of
CRACKING PRESSURE TOLERANCE. . . . . . . . . . . . . . . . . ±5% cracking pressure.
Cracking pressure on initial crack may be higher than cracking Teflon® (520) . . . . . . . . . . . . . . . . 1 cc/min. to
pressure tolerance due to inherent characteristics of seals. reseal pressure.
(Consult Factory) 10 cc/min. max. with gas from reseal to cracking pressure.
LEAKAGE at Reseal Pressure
All elastomeric seals zero. Teflon® (Consult Factory).
For information on replacement parts and cracking pressure adjustment request Service Information for 500/D500 Series.
500 SERIES
.5 - 150 PSI
HYDRAULIC FLUID MIL-H-5606 RATE OF FLOW — GPM HYDRAULIC FLUID MIL-H-5606 RATE OF FLOW — GPM
D500 Series
Pressure Drop — PSI