Pressure Relief Valves | Parker NA
Relief Valves, 6,000 PSI - R Series. Parker''s R Series Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Pressures range from 10 PSI (0.7 BAR) to 6,000 PSI (413.7 BAR). 999 Parts.