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The ZA/ZE series OH2 type is a horizontal, end‑suction, single‑stage, centerline‑mounted, overhung centrifugal pump designed strictly in accordance with API 610 12th Edition.
It adopts a centerline‑mounted casing structure, which provides excellent thermal growth stability and is highly suitable for high‑temperature and high‑pressure process services. The pump features a back pull‑out design, enabling easy maintenance without disassembling the piping, baseplate or driver.
It is equipped with a rigid shaft, heavy‑duty rolling bearing assembly, and highly reliable mechanical seal system, ensuring low vibration, low noise, and long‑term stable operation. With strong adaptability to high‑temperature conditions, high structural rigidity, and good hydraulic performance, the OH2 pump offers high reliability and long service life.
Main Performance Data
Flow: 9 - 2390 m3/h
Delivery Head: 12 - 130m
Outlet Dia.: 32 - 350mm
Working Pressure: ≤ 2.5Mpa
Solid Particle: ≤ 80mg/L
Liquid Temp.: 0℃ - 150℃
Model Instruction
E.G.: ZA80-160A
ZA: Single stage processing pump (Over-Hang)
ZE: Single stage processing pump (Central-Support)
80: Outlet diameter is 80mm
160: Rate impeller diameter is 160mm
A(B,C....): Impeller code
Applications
Refineries, Petrochemical industry, Coal processing, Chemical industry, Fibre processing industry, Paper & pulp industry Sugar industry, Civil waterworks, Sea water desalination plants, Heading & Air conditioning, Enviromental protection engineering.
Main Parts Configuration
OH2: Horizontal, end‑suction, single‑stage, centerline‑mounted, overhung centrifugal pump (API 610 12th Ed.)
The pump could be applied to transfer different kinds of liquid by customized wet parts, here followed our recommendation of main configuration:
| Material Grade | Casing | Impeller | Shaft | Wear Rings / Sleeve | Throat Bushing | Fasteners (Stud/Nut) | Typical Service |
|---|---|---|---|---|---|---|---|
| I‑1 | ASTM A278 Cl 30 | ASTM A278 Cl 30 | AISI 1045 | CI | CI | A193 B7 / A194 2H | Clean water, non‑corrosive, low pressure |
| S‑5 | ASTM A216 Gr WCB | ASTM A216 Gr WCB | AISI 4140 (HT) | 12% Cr SS (HT) | 12% Cr SS (HT) | A193 B7 / A194 2H | General hydrocarbon, clean water |
| S‑6 | ASTM A216 Gr WCB | ASTM A217 Gr CA15 (12% Cr) | AISI 4140 (HT) | 12% Cr SS (HT) | 12% Cr SS (HT) | A193 B7 / A194 2H | Light corrosion, high‑temp water |
| S‑8 | ASTM A216 Gr WCB | ASTM A351 Gr CF8M (316 SS) | AISI 4140 (HT) | 316 SS (Hard‑faced) | 316 SS (Hard‑faced) | A193 B7 / A194 2H | Mild corrosion, carbon steel casing |
| A‑8 | ASTM A351 Gr CF8M (316 SS) | ASTM A351 Gr CF8M | A479 316 SS | 316 SS (Hard‑faced) | 316 SS (Hard‑faced) | A193 B8M / A194 8M | Moderate corrosion, low chloride |
| C‑6 | ASTM A487 Gr CA6NM | ASTM A743 Gr CA6NM | A276 420 SS (HT) | 420 SS (HT) | 420 SS (HT) | A193 B7 / A194 2H | Erosive, high‑temp water, sour service |
| D‑1 | ASTM A890 Gr 4A (2205 Duplex) | ASTM A890 Gr 4A | A479 XM‑19 | Duplex SS (Hard‑faced) | Duplex SS (Hard‑faced) | A193 B8M / A194 8M | High chloride, seawater, moderate sour |
| D‑2 | ASTM A890 Gr 5A (Super Duplex) | ASTM A890 Gr 5A | A479 XM‑19 | Super Duplex SS | Super Duplex SS | A193 B8M / A194 8M | Severe corrosion, high chloride, harsh chemicals |
