Product Specification

Model: OMWH12-H-6-IR-A

1. Product Overview

1. Welding: Bracket and copper alloy resistive element welded on non‑sheared surfaces; no gaps, cold joints or false welds. Pickling before welding, passivation after welding.
2. Appearance: Flat, smooth and uniform surface; no burrs, burns, slag, contamination or cracks.
3. Encapsulation: Welded areas covered with transparent heat‑shrink tube, tight and wrinkle‑free. Leads firmly fixed, color coding clear.

6. Test & Acceptance Criteria

1. Factory Test: 100% inspection of resistance (200μΩ±3%), appearance and lead continuity; Factory Test Report issued.
2. Sampling Test: Per GB/T 2828.1-2012, sampling for withstand voltage, insulation and tensile strength, AQL=0.65.
3. Acceptance Documents: Factory test report, material certificate, RoHS/REACH compliance (upon request).

7. Packaging & Transportation

1. Packaging: Individually packed in anti‑static bags, 50/100 pcs per box. Outer box labeled with model, quantity, date and batch number.
2. Transportation: Moisture‑proof and anti‑vibration packaging, avoid impact. Comply with RoHS and REACH for international logistics.

Core Functions

• Flow Distribution / Collection: Distribute coolant from the main line evenly to multiple cold plates; collect heated fluid from each branch and return it to the cooling source / CDU after heat exchange.
• Pressure & Resistance Management: Control pressure drop in each branch to prevent local overheating caused by uneven flow.
• Simplified Piping & Maintenance: Reduce the number of connectors; with quick connectors, single cold plates can be rapidly installed or removed for maintenance.
• Monitoring & Regulation (High‑end Models): Integrated flow meters, temperature / pressure sensors, and even valves for fine‑tuning flow in each branch.

Common Types & Structures

By Application

• Manifold (Supply Side): 1 inlet, N outlets.
• Collector (Return Side): N inlets, 1 outlet; usually used in pairs.

By Flow Division Method

• Y‑type / Tee Manifold: 1 inlet, 2 outlets; suitable for small systems with two cold plates.
• Bar / Row Manifold: 1 inlet, multiple outlets (e.g., 1‑to‑4, 1‑to‑6); commonly used in data centers / mining rigs.
• Annular Manifold: For closed‑loop liquid cooling circuits.

By Adjustability

• Fixed Type: No valves, low cost; flow determined by orifice / channel design.
• Adjustable Type: Each branch equipped with needle / ball valves; flow adjustable manually or electrically.

Material & Interface

• Materials: Mainly aluminum alloy / stainless steel / copper.
   
  Aluminum alloy: lightweight, moderate cost.
   
  Stainless steel: high pressure resistance, good corrosion resistance.
   
  Copper: excellent thermal conductivity but high cost.
   
  Must be compatible with system coolant to prevent corrosion.
• Interfaces:
   
  PC water cooling: commonly G1/4" thread.
   
  Industrial / data center: flanges, compression fittings, quick connectors (e.g., DME, ISO 8434).
• Sealing: Must use O‑rings / gaskets to prevent leakage; recommended materials: Nitrile Rubber (NBR) or Fluororubber (FKM).

Key Selection Parameters

• Number of Branches & Flow Demand: Ensure sufficient flow for each cold plate to meet cooling requirements and avoid excessive pressure drop.
• Working Pressure / Temperature: Industrial cold plates typically operate at 0.3–1 MPa, 30–50°C.
• Flow Resistance & Uniformity: Flow channel design determines flow deviation; high‑end systems require inter‑branch flow deviation < 5%.
• Interface Size & Compatibility: Match inner diameter of tubing and connector type.
• Installation Space: Length and height of bar manifolds must fit cabinet / equipment layout.

Application Scenarios

• Personal PC / Workstation: Y‑type manifold for CPU + GPU dual cold plates.
• Data Center AI Servers: Rack‑mount bar manifolds, 1‑to‑8/16 for multi‑GPU cold plates.
• Miner Clusters: Multi‑branch manifolds cooling multiple hash boards simultaneously.
• New Energy Vehicle Battery Packs: Centralized supply and return for liquid cooling plates.

Installation & Notes

• Separate supply and return lines to avoid thermal short‑circuit.
• Tighten connectors evenly; torque wrench recommended.
• Fully vent air during initial system filling.
• Regularly inspect seal aging to prevent leakage.
• Install manifold in an easily accessible and observable location.