Collector Header for Resin Underdrain Systems

Product Specifications

Technical details and manufacturing context for Collector Header

Definition

The Collector Header is a critical component within the Resin Underdrain/Collector System, serving as the main collection and distribution manifold. It connects to multiple lateral pipes or laterals that collect filtered water or backwash flow from the resin bed. Its primary function is to consolidate the flow from these laterals into a single outlet pipe, ensuring uniform flow distribution during service cycles and efficient collection during backwash or regeneration cycles in ion exchange, softening, or filtration systems. The header is available in materials such as stainless steel (304/316L), PVC-U, CPVC, and polypropylene, with nominal diameters ranging from DN50 to DN300 (ISO 6708). Operating pressure is typically 1.0–1.6 MPa, with a hydrostatic shell test pressure of 1.5×PN. Operating temperature ranges from 0 to 60°C, above which pressure ratings may be reduced. Material grades include PP-H (DIN 8078) for polypropylene, and wall thicknesses follow SDR 11–SDR 33 (ISO 4065). Standard lengths are 1000–6000 mm, with custom lengths available. Outlet connections are flanged or threaded, sized DN50–DN150 (ISO 7005), and the number of outlets typically ranges from 2 to 8, evenly spaced for uniform flow. Flow capacity is 10–200 m³/h at 1.0 MPa pressure drop, with an actual pressure drop of 0.01–0.05 MPa at maximum flow. Weight varies from 5 to 50 kg depending on size and wall thickness. These values are directory reference ranges; verify model-specific specifications with the manufacturer. The header's design ensures balanced pressure and flow across all connected laterals, which is essential for effective resin bed performance. Proper selection requires consideration of system flow rate, pipe sizing, material compatibility, and operating conditions. During maintenance, inspect for leaks, corrosion, or blockages, and verify that all connections remain tight. Failure to maintain the header can lead to uneven flow distribution, reduced filtration efficiency, or system downtime.

Working Principle

The Collector Header operates by providing a common manifold with multiple inlet ports connected to lateral pipes. During service flow, filtered water enters through the laterals and converges into the header's main chamber, then exits through a single outlet. During backwash, the flow reverses - water enters through the outlet, distributes evenly through the header's internal volume, and then flows out through the laterals to fluidize and clean the resin bed. The header's design ensures balanced pressure and flow across all connected laterals.

Common Materials

Stainless Steel (304/316L), PVC-U, CPVC, Polypropylene

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN50–DN300 mm	Matches lateral connectionsISO 6708
Operating Pressure	1.0–1.6 MPa	Below 1.0 MPa seat load insufficientISO 5208
Test Pressure	1.5×PN MPa	Hydrostatic shell testISO 5208
Operating Temperature	0–60 °C	Above 60°C reduces pressure rating
Material Grade	PP-H	UV stabilized for outdoor useDIN 8078
Wall Thickness	5–30 mm	SDR 11–SDR 33ISO 4065
Length	1000–6000 mm	Custom lengths available
Outlet Connection	DN50–DN150 mm	Flanged or threadedISO 7005
Number of Outlets	2–8	Evenly spaced for uniform flow
Flow Capacity	10–200 m³/h	At 1.0 MPa pressure drop
Pressure Drop	0.01–0.05 MPa	At max flow rate
Weight	5–50 kg	Depends on size and wall thickness

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

Main Header Pipe Part
Primary collection and distribution conduit

Material: Stainless Steel/PVC
Lateral Connection Ports Part
Interface points for lateral pipe connections

Material: Same as header
Outlet Flange/Connection Part
Connection point to system outlet piping

Material: Stainless Steel/PVC
Support Brackets Part
Structural support and mounting

Material: Stainless Steel

Applied To / Applications

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

Resin Underdrain / Collector System

View system integration details

Manufacturers of Collector Header

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Frequently Asked Questions

What is the primary function of a Collector Header?

The Collector Header consolidates flow from multiple lateral pipes into a single outlet during service, and distributes backwash water evenly during cleaning cycles, ensuring uniform flow distribution.

Which materials are available for the Collector Header?

Available materials include stainless steel (304/316L), PVC-U, CPVC, and polypropylene. Material selection depends on chemical compatibility and operating conditions.

What are the typical operating pressure and temperature ranges?

Operating pressure is typically 1.0–1.6 MPa, and operating temperature ranges from 0 to 60°C. Above 60°C, pressure ratings may be reduced. Always verify with the manufacturer.

How do I verify the correct size for my system?

Consider the system flow rate, pipe diameters, and number of laterals. The header's nominal diameter ranges from DN50 to DN300, and outlet connections from DN50 to DN150. Consult the manufacturer for sizing calculations.

Data Basis

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

Preliminary Technical Classification

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pressure:	Max 50 psi (3.4 bar) operating, 75 psi (5.2 bar) surge
flow rate:	Up to 100 gpm per lateral connection
temperature:	0°C to 60°C (32°F to 140°F)
slurry concentration:	Max 5% solids by weight

Collector Header

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

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