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Parker's, in line check valves are one way flow control devices used primarily in hydraulic systems to eliminate potential damage caused by fluid back pressure.
DC Series Hydraulic Check Valves (up to 3,000 psi) have a metal to metal hard seat design with a one piece body and all steel construction. Both inlet and outlet ports have female end fittings. These are in line one way valves with standard spring crack pressures of 1, 5, and 65 psi. DC Series Hydraulic Check Valves have low pressure drop and are available in a wide range of sizes up to 2"" and flow capacities to 300 gpm.
Hydraulic check valves are important components that are often overlooked when building a fluid system. A check valve can optimize system performance in the following ways:
• Ensure hydraulic fluid flows in only one direction
• Eliminate potential damage from back pressure
• Isolate sections of a system or system components
Basic check valve construction consists of a valve body with an inlet and an outlet port. Inside, a moveable poppet valve is controlled by spring pressure. In most cases the valve is normally closed, opening when the fluid pressure is greater than the spring force (crack pressure), thus allowing the fluid to flow one way only. When reverse flow attempts to enter though the outlet the poppet closes and flow through the valve is stopped.
Hard seat, in line hydraulic check valves utilize a durable metal to metal seal to withstand high flow surges and provide longer service life.
Technical Characteristics:
• Sizes: 1/4” to 2""
• Material: Steel
• Inlet Port Ends: Female NPSF, Female UNF, Female NPTF, Female UN
• Outlet Port Ends: Female NPSF, Female UNF, Female NPTF, Female UN
• Optional crack pressures available from 1 to 200 psi in 5 psi increments
• Orificed valve option
• Custom shapes and configurations
Note: Some options may not be standard configurations. Please contact the Quick Coupling Division for availability and delivery.
Markets:
• Industrial
• Construction
• Agriculture
• Transportation
• MRO
Features/Benefits:
• Allows the fluid to flow in only one direction (one way valves), protecting the system from fluid back pressure
• Low pressure drop
• metal to metal hard seat provides longer life and is durable for high flow surges
• Custom shapes and configurations can integrate special features to reduce the number of components and potential leak points in a system
• Optional crack pressures are available on request
• Optional orificed valve allows metered flow when the valve is closed. Orifice bore size is determined by application requirements.
Applications:
• Industrial, mobile, and construction equipment
• Restrictor Check Circuit
• High/Low Pump Circuit
• Slow Advance/Rapid Return Circuit
• Oil Cooler By-Pass Circuit
• Sequence Circuit
• Pilot Pressure Circuit
• Accumulator Circuit
| Literature and Reference Materials |
|---|
| Catalog 3800 Quick Coupling Products |
| Fluid Compatibility Chart |
| Port End Assembly Guide |
| QCD Check Valve Product Guide |
| Compliance, Certifications & Safety |
|---|
| Safety Guide: Quick Couplings and Related Accessories |
| Product Demos & Tutorials |
|---|
| How to Install and Operate Check Valves |
| Productos | Tamaño del cuerpo (pulg) | Presión de fisuración (psi) | Tamaño del puerto de entrada (pulg) | Tipo de conexión del puerto de entrada | Tamaño del puerto de salida (pulg) | Tipo de conexión del puerto de salida |
|---|---|---|---|---|---|---|
| DC-250-FOFO-5 | 1/4 | 5 | 7/16 - 20 UNF | Female SAE O-ring Straight Thread | 5000 | Female SAE O-ring Straight Thread |
| DC-250-5 | 1/4 | 5 | 1/4 - 18 NPSF | Female Pipe Thread | 1/4 - 18 NPSF | Female Pipe Thread |
| DC-250-65 | 1/4 | 65 | 1/4 - 18 NPSF | Female Pipe Thread | 1/4 - 18 NPSF | Female Pipe Thread |
| DC-370-FOFO-5 | 3/8 | 5 | 9/16 - 18 UNF | Female SAE O-ring Straight Thread | 5000 | Female SAE O-ring Straight Thread |
| DC-370-5 | 3/8 | 5 | 3/8 - 18 NPSF | Female Pipe Thread | 3/8 - 18 NPSF | Female Pipe Thread |
| DC-370-65 | 3/8 | 65 | 3/8 - 18 NPSF | Female Pipe Thread | 3/8 - 18 NPSF | Female Pipe Thread |
| DC-500-FOFO-5 | 1/2 | 5 | 3/4 - 16 UNF | Female SAE O-ring Straight Thread | 3/4 - 16 UNF | Female SAE O-ring Straight Thread |
| DC-500-5 | 1/2 | 5 | 1/2 - 14 NPSF | Female Pipe Thread | 1/2 - 14 NPSF | Female Pipe Thread |
| DC-500-65 | 1/2 | 65 | 1/2 - 14 NPSF | Female Pipe Thread | 1/2 - 14 NPSF | Female Pipe Thread |
| DC-750-FOFO-5 | 3/4 | 5 | 1 1/16 - 12 UN | Female SAE O-ring Straight Thread | 1 1/16 - 12 UN | Female SAE O-ring Straight Thread |
| DC-750-FOFO-65 | 3/4 | 65 | 1 1/16 - 12 UN | Female SAE O-ring Straight Thread | 1 1/16 - 12 UN | Female SAE O-ring Straight Thread |
| DC-750-5 | 3/4 | 5 | 3/4 - 14 NPSF | Female Pipe Thread | 3/4 - 14 NPSF | Female Pipe Thread |
| DC-750-65 | 3/4 | 65 | 3/4 - 14 NPSF | Female Pipe Thread | 3/4 - 14 NPSF | Female Pipe Thread |
| DC-1000-FOFO-5 | 1 | 5 | 1 5/16 - 12 UN | Female SAE O-ring Straight Thread | 1 5/16 - 12 UN | Female SAE O-ring Straight Thread |
| DC-1000-5 | 1 | 5 | 1 - 11 1/2 NPSF | Female Pipe Thread | 1 - 11 1/2 NPSF | Female Pipe Thread |
| DC-1000-65 | 1 | 65 | 1 - 11 1/2 NPSF | Female Pipe Thread | 1 - 11 1/2 NPSF | Female Pipe Thread |
| DC-1250-5 | 1 1/4 | 5 | 1 1/4 - 11 1/2 NPTF | Female Pipe Thread | 1 1/4 - 11 1/2 NPTF | Female Pipe Thread |
| DC-1250-65 | 1 1/4 | 65 | 1 1/4 - 11 1/2 NPTF | Female Pipe Thread | 1 1/4 - 11 1/2 NPTF | Female Pipe Thread |
| DC-1500-FOFO-5 | 1 1/2 | 5 | 1 7/8 - 12 UN | Female SAE O-ring Straight Thread | 1 7/8 - 12 UN | Female SAE O-ring Straight Thread |
| DC-1500-FOFO-65 | 1 1/2 | 65 | 1 7/8 - 12 UN | Female SAE O-ring Straight Thread | 1 7/8 - 12 UN | Female SAE O-ring Straight Thread |
| DC-1500-5 | 1 1/2 | 5 | 1 1/2 - 11 1/2 NPTF | Female Pipe Thread | 1 1/2 - 11 1/2 NPTF | Female Pipe Thread |
| DC-2000-5 | 2 | 5 | 2 - 11 1/2 NPTF | Female Pipe Thread | 2 - 11 1/2 NPTF | Female Pipe Thread |
| DC-2000-65 | 2 | 65 | 2 - 11 1/2 NPTF | Female Pipe Thread | 2 - 11 1/2 NPTF | Female Pipe Thread |
