Inlet/Outlet Check Valve for Metering Pumps | Specifications & Standards

Product Specifications

Technical details and manufacturing context for Inlet/Outlet Check Valve

Definition

An inlet/outlet check valve is a critical component within metering pump and valve assemblies that ensures unidirectional fluid flow. It opens to permit fluid passage in the intended direction during pump operation and automatically closes to prevent reverse flow when pressure differentials change, maintaining system integrity and preventing contamination or damage. This valve is designed for use in metering pump systems, where precise flow control and backflow prevention are essential. The valve operates based on pressure differentials: it opens when the inlet pressure exceeds the outlet pressure plus the spring force, and closes when the outlet pressure exceeds the inlet pressure or when flow reverses. The sealing mechanism typically uses a disc, ball, or poppet that seals against a seat. Common materials include stainless steel, PTFE, and ceramic, offering corrosion resistance and chemical compatibility. Key parameters include nominal diameter (15–100 mm per ISO 6708), operating pressure (1.0–1.6 MPa), operating temperature (-40–85 °C), cracking pressure (0.05–0.1 MPa), leakage rate (0–0.1 mL/min at rated pressure per ISO 5208), flow coefficient (Cv 2.5–25 gpm/psi^0.5 at full open), body material (316L per ASTM A240), seal material (PTFE per ASTM D4894), connection type (flanged per EN 1092-1), and weight (2–15 kg). These values are reference ranges and must be verified for the specific model and application. The valve is available in various configurations, and the listed standards serve as procurement and verification references, not as proof of certification or compliance. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The valve operates on pressure differentials. When the inlet pressure exceeds the outlet pressure plus the spring force, the disc, ball, or poppet lifts off its seat, allowing fluid to flow in the intended direction. When the outlet pressure exceeds the inlet pressure or flow reverses, the sealing element is forced back onto the seat, creating a tight seal that prevents backflow. This automatic action ensures unidirectional flow and protects the system from contamination or damage.

Common Materials

Stainless Steel, PTFE, Ceramic

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	15–100 mm	Common sizes for metering pump systemsISO 6708
Operating Pressure	1.0–1.6 MPa	Below 1.0 MPa the seat load is insufficient
Operating Temperature	-40–85 °C	Seal material limits
Cracking Pressure	0.05–0.1 MPa	Minimum pressure to open the valve
Leakage Rate	0–0.1 mL/min	At rated pressure
Flow Coefficient (Cv)	2.5–25 gpm/psi^0.5	At full open
Body Material	316L	Corrosion resistantASTM A240
Seal Material	PTFE	Chemical compatibilityASTM D4894
Connection Type	Flanged	Other types availableEN 1092-1
Weight	2–15 kg	Depends on size and pressure rating

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Valve Body
Main housing that contains fluid and provides connection ports

Material: Stainless Steel
Sealing Element Part
Disc, ball, or poppet that creates the seal against the seat

Material: PTFE or Ceramic
Spring Part
Provides closing force to ensure positive sealing

Material: Stainless Steel
Seat Part
Surface against which the sealing element closes to prevent backflow

Material: Stainless Steel or Ceramic

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Inlet/Outlet Check Valve.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Metering Pump/Valve

View system integration details

Manufacturers of Inlet/Outlet Check Valve

Manufacturer profiles associated with Inlet/Outlet Check Valve.

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Frequently Asked Questions

What is the primary function of an inlet/outlet check valve?

It ensures unidirectional fluid flow in metering pump systems, opening to allow flow in the intended direction and closing to prevent backflow when pressure differentials change.

What materials are commonly used for this valve?

Common materials include stainless steel (e.g., 316L), PTFE, and ceramic, providing corrosion resistance and chemical compatibility.

What are the typical operating pressure and temperature ranges?

The operating pressure range is 1.0–1.6 MPa, and the operating temperature range is -40 to 85 °C. These are reference values; confirm for your specific model.

How do I verify that a valve meets my system requirements?

Check the valve's nominal diameter, pressure rating, temperature limits, cracking pressure, leakage rate, and flow coefficient against your system's needs. Always consult the manufacturer for model-specific data and standards compliance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 10 bar (150 psi)
flow rate:	0.5 to 50 L/min
temperature:	-20°C to 120°C
slurry concentration:	Up to 20% solids by weight

Inlet/Outlet Check Valve

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards