Account Cart

Loading Mini-cart...

Refine
FILTERSClear All
Department: ValvesX
Product Type: Instrumentation GradeX
Product Sub-Type: Check ValvesX
Product: Relief Valve - Angle - RL4X
Operating Temperature: -45 F to 250 F (-43 C to 121 C)X

Trade Name

A-LOK® (9) CPI™ (6)

Connection Type

Double ferrule compression (8) Male NPT / Double ferrule compression (1) Male NPT / Female NPT (6) Single ferrule compression (6)

Inlet port 1

1/4" A-LOK compression (8) 1/4" CPI compression (6) 1/4" male NPT (7)

Outlet port 2

1/4" A-LOK compression (9) 1/4" CPI compression (6) 1/4" female NPT (6)

Coded label color

Brown (3) Dark blue (2) Dark green (3) Magenta (4) None (2) Purple (3) White (2)

Cracking Pressure

10-25 psig (0.7-1.7 bar) (4) 10-225 psig (0.7-15.5 bar) (2) 25-50 psig (1.7-3.4 bar) (3) 50-100 psig (3.4-6.9 bar) (3) 100-150 psig (6.9-10.3 bar) (3) 150-225 psig (10.3-15.5 bar) (2) 225-400 psig (15.5-27.6 bar) (2) Valve without spring kit (2)

Special Cleaning

Cleaning for oxygen service (1)
Click Image to Zoom
Relief Valve - Angle - RL4Relief Valve - Angle - RL4

Relief Valve - Angle - RL4

Parker Angle Relief Valve - RL4 Series

Email this page to a friend


Showing 1 - 20 of 21  
Part # Availability Price/UOM
4A-RL4A-NET-SS N/A Call to Order
++ 4A-RL4A-NET-SS-KA Out of Stock - Lead Time Required $315.56
++ 4A-RL4A-NET-SS-KB Out of Stock - Lead Time Required $315.56
++ 4A-RL4A-NET-SS-KC Out of Stock - Lead Time Required $315.56
++ 4A-RL4A-NET-SS-KD Out of Stock - Lead Time Required $315.56
++ 4A-RL4A-NET-SS-KE Out of Stock - Lead Time Required $315.56
++ 4A-RL4A-NET-SS-KF Out of Stock - Lead Time Required $320.09
++ 4A-RL4A-NET-SS-KG Out of Stock - Lead Time Required $315.56
++ 4M4A-RL4A-NET-SS-KA Out of Stock - Lead Time Required $321.52
++ 4M4F-RL4A-NET-SS Out of Stock - Lead Time Required $296.02
++ 4M4F-RL4A-NET-SS-KA Out of Stock - Lead Time Required $308.18
++ 4M4F-RL4A-NET-SS-KB Out of Stock - Lead Time Required $308.18
++ 4M4F-RL4A-NET-SS-KC Out of Stock - Lead Time Required $308.18
++ 4M4F-RL4A-NET-SS-KD Out of Stock - Lead Time Required $308.18
++ 4M4F-RL4A-NET-SS-KF Out of Stock - Lead Time Required $308.18
++ 4Z-RL4A-NET-SS-KA Out of Stock - Lead Time Required $315.56
++ 4Z-RL4A-NET-SS-KB Out of Stock - Lead Time Required $315.56
++ 4Z-RL4A-NET-SS-KC Out of Stock - Lead Time Required $315.56
++ 4Z-RL4A-NET-SS-KD Out of Stock - Lead Time Required $315.56
++ 4Z-RL4A-NET-SS-KE Out of Stock - Lead Time Required $315.56
UOM Inlet port 1 Outlet port 2 Material - Seals Cracking pressure Material Country of Origin (COO) Harmonized Tariff (HTS)
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber Valve without spring kit Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber 10-25 psig (0.7-1.7 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber 25-50 psig (1.7-3.4 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber 50-100 psig (3.4-6.9 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber 100-150 psig (6.9-10.3 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber 150-225 psig (10.3-15.5 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber 10-225 psig (0.7-15.5 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" A-LOK compression 1/4" A-LOK compression Neoprene rubber 225-400 psig (15.5-27.6 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" male NPT 1/4" A-LOK compression Neoprene rubber 10-25 psig (0.7-1.7 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" male NPT 1/4" female NPT Neoprene rubber Valve without spring kit Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" male NPT 1/4" female NPT Neoprene rubber 10-25 psig (0.7-1.7 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" male NPT 1/4" female NPT Neoprene rubber 25-50 psig (1.7-3.4 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" male NPT 1/4" female NPT Neoprene rubber 50-100 psig (3.4-6.9 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" male NPT 1/4" female NPT Neoprene rubber 100-150 psig (6.9-10.3 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" male NPT 1/4" female NPT Neoprene rubber 10-225 psig (0.7-15.5 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" CPI compression 1/4" CPI compression Neoprene rubber 10-25 psig (0.7-1.7 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" CPI compression 1/4" CPI compression Neoprene rubber 25-50 psig (1.7-3.4 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" CPI compression 1/4" CPI compression Neoprene rubber 50-100 psig (3.4-6.9 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" CPI compression 1/4" CPI compression Neoprene rubber 100-150 psig (6.9-10.3 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
EA 1/4" CPI compression 1/4" CPI compression Neoprene rubber 150-225 psig (10.3-15.5 bar) Stainless Steel Special request, please call for COO Special request, please call for HTS
4A-RL4A-NET-SS
N/A
Call to Order
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

Valve without spring kit

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4A-RL4A-NET-SS-KA
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

10-25 psig (0.7-1.7 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4A-RL4A-NET-SS-KB
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

25-50 psig (1.7-3.4 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4A-RL4A-NET-SS-KC
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

50-100 psig (3.4-6.9 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4A-RL4A-NET-SS-KD
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

100-150 psig (6.9-10.3 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4A-RL4A-NET-SS-KE
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

150-225 psig (10.3-15.5 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4A-RL4A-NET-SS-KF
Out of Stock - Lead Time Required
$320.09
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

10-225 psig (0.7-15.5 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4A-RL4A-NET-SS-KG
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" A-LOK compression

1/4" A-LOK compression

Neoprene rubber

225-400 psig (15.5-27.6 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4M4A-RL4A-NET-SS-KA
Out of Stock - Lead Time Required
$321.52
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" male NPT

1/4" A-LOK compression

Neoprene rubber

10-25 psig (0.7-1.7 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4M4F-RL4A-NET-SS
Out of Stock - Lead Time Required
$296.02
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" male NPT

1/4" female NPT

Neoprene rubber

Valve without spring kit

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4M4F-RL4A-NET-SS-KA
Out of Stock - Lead Time Required
$308.18
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" male NPT

1/4" female NPT

Neoprene rubber

10-25 psig (0.7-1.7 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4M4F-RL4A-NET-SS-KB
Out of Stock - Lead Time Required
$308.18
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" male NPT

1/4" female NPT

Neoprene rubber

25-50 psig (1.7-3.4 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4M4F-RL4A-NET-SS-KC
Out of Stock - Lead Time Required
$308.18
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" male NPT

1/4" female NPT

Neoprene rubber

50-100 psig (3.4-6.9 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4M4F-RL4A-NET-SS-KD
Out of Stock - Lead Time Required
$308.18
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" male NPT

1/4" female NPT

Neoprene rubber

100-150 psig (6.9-10.3 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4M4F-RL4A-NET-SS-KF
Out of Stock - Lead Time Required
$308.18
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" male NPT

1/4" female NPT

Neoprene rubber

10-225 psig (0.7-15.5 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4Z-RL4A-NET-SS-KA
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" CPI compression

1/4" CPI compression

Neoprene rubber

10-25 psig (0.7-1.7 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4Z-RL4A-NET-SS-KB
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" CPI compression

1/4" CPI compression

Neoprene rubber

25-50 psig (1.7-3.4 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4Z-RL4A-NET-SS-KC
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" CPI compression

1/4" CPI compression

Neoprene rubber

50-100 psig (3.4-6.9 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4Z-RL4A-NET-SS-KD
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" CPI compression

1/4" CPI compression

Neoprene rubber

100-150 psig (6.9-10.3 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
4Z-RL4A-NET-SS-KE
Out of Stock - Lead Time Required
$315.56
View

UOM:

Inlet port 1:

Outlet port 2:

Material - Seals:

Cracking pressure:

Material:

Country of Origin (COO):

Harmonized Tariff (HTS):

EA

1/4" CPI compression

1/4" CPI compression

Neoprene rubber

150-225 psig (10.3-15.5 bar)

Stainless Steel

Special request, please call for COO

Special request, please call for HTS
Showing 1 - 20 of 21
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. Pressure settings are externally adjustable while the valve is in operation. Seven different spring ranges provide greater system sensitivity and enhanced performance.

Application: In the key markets of chemical & refining, food, beverage & dairy, medical & dental, microelectronics, oil & gas, and power generation.
Parker Instrumentation Check Valves
Parker Instrumentation Check Valves
Updating...