Login or create an account
CloseReturning Customer
I am a returning customer
Login or create an account
CloseRegister Account
If you already have an account with us, please login at the login form.
Your Account Has Been Created!
Thank you for registering with Welcome to Supertechnical!
You will be notified by e-mail once your account has been activated by the store owner.
If you have ANY questions about the operation of this online shop, please contact the store owner.
Account Logout
You have been logged off your account. It is now safe to leave the computer.
Your shopping cart has been saved, the items inside it will be restored whenever you log back into your account.
Relief Valves
Relief Valves
H SERIES PROPORTIONAL
RELIEF VALVE 6,000 PSI
The valves offer a choice of 14 different ranges of opening (or ‘cracking’)
pressures, from 10-25 to 4,975-6,000 PSI (0.7-1.7 to 343-414 bar). A low
friction stem seal and a balanced poppet design ensures accurate and consistent
cracking pressure, regardless of system back pressure. Cracking pressure is
maintained to within 3% of its setting, and can be finely adjusted by means of
an external nut, secured in position by Parker’s unique Tru-Loc™ mechanism.
The
connections are available in 6 mm and 1/4" sizes, and with choice of male
or female NPT, Parker CPI™ single ferrule or Parker A-LOK® double ferrule
compression fittings.
All H
series pressure relief valves are manufactured from 316 stainless steel. The
maximum operating pressure rating and permissible temperature range depends on
the particular model. For maximum applications flexibility, there is an
extensive choice of O-ring seal materials, including fluorocarbon rubber,
Buna-N, ethylene propylene rubber, highly fluorinated fluorocarbon rubber and
neoprene rubber.
Parker’s H series proportional pressure relief
valves are CE marked and certified to the highest Category-IV level of the
Pressure Equipment Directive (PED).
RH4
Series Relief Valves
Parker RH4 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. Flow through the valve increases
proportionately to the increase in upstream pressure.
Features
·
Pressure settings are externally adjustable
while the valve is in operation. Eight different spring ranges provide greater
system sensitivity and enhanced performance.
·
Captured molded seat design is blow-out and chip
resistant.
·
Manual Override option with positive stem
retraction is available for pressures up to 1500 psig (103 bar).
·
This option permits the user to relieve upstream
pressure while maintaining the predetermined
·
cracking pressure.
·
Color coded springs and labels indicate spring
cracking range.
·
Lock wire feature secures a given pressure
setting.
RL4
Series Relief Valves
Parker RL4 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. Flow through the valve increases
proportionately to the increase in upstream pressure.
Features
·
Pressure settings are externally adjustable
while the valve is in operation. Seven different spring ranges provide greater
system sensitivity and enhanced performance.
·
Manual override option with positive stem
retraction is available for the full working pressures range. This option
permits the user to relieve upstream pressure while maintaining the
predetermined cracking pressure.
·
Color coded springs and labels indicate spring cracking
range.
·
Back pressure has minimum effect on cracking pressure.
·
Lock wire feature secures a given pressure
setting.
Relief Valves
H SERIES PROPORTIONAL
RELIEF VALVE 6,000 PSI
The valves offer a choice of 14 different ranges of opening (or ‘cracking’)
pressures, from 10-25 to 4,975-6,000 PSI (0.7-1.7 to 343-414 bar). A low
friction stem seal and a balanced poppet design ensures accurate and consistent
cracking pressure, regardless of system back pressure. Cracking pressure is
maintained to within 3% of its setting, and can be finely adjusted by means of
an external nut, secured in position by Parker’s unique Tru-Loc™ mechanism.
The
connections are available in 6 mm and 1/4" sizes, and with choice of male
or female NPT, Parker CPI™ single ferrule or Parker A-LOK® double ferrule
compression fittings.
All H
series pressure relief valves are manufactured from 316 stainless steel. The
maximum operating pressure rating and permissible temperature range depends on
the particular model. For maximum applications flexibility, there is an
extensive choice of O-ring seal materials, including fluorocarbon rubber,
Buna-N, ethylene propylene rubber, highly fluorinated fluorocarbon rubber and
neoprene rubber.
Parker’s H series proportional pressure relief
valves are CE marked and certified to the highest Category-IV level of the
Pressure Equipment Directive (PED).
RH4
Series Relief Valves
Parker RH4 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. Flow through the valve increases
proportionately to the increase in upstream pressure.
Features
·
Pressure settings are externally adjustable
while the valve is in operation. Eight different spring ranges provide greater
system sensitivity and enhanced performance.
·
Captured molded seat design is blow-out and chip
resistant.
·
Manual Override option with positive stem
retraction is available for pressures up to 1500 psig (103 bar).
·
This option permits the user to relieve upstream
pressure while maintaining the predetermined
·
cracking pressure.
·
Color coded springs and labels indicate spring
cracking range.
·
Lock wire feature secures a given pressure
setting.
RL4
Series Relief Valves
Parker RL4 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. Flow through the valve increases
proportionately to the increase in upstream pressure.
Features
·
Pressure settings are externally adjustable
while the valve is in operation. Seven different spring ranges provide greater
system sensitivity and enhanced performance.
·
Manual override option with positive stem
retraction is available for the full working pressures range. This option
permits the user to relieve upstream pressure while maintaining the
predetermined cracking pressure.
·
Color coded springs and labels indicate spring cracking
range.
·
Back pressure has minimum effect on cracking pressure.
·
Lock wire feature secures a given pressure
setting.