Hebei HOPU SHZ-CD Stainless Steel Circulating Water Vacuum Pump

Overview

The Hebei HOPU SHZ-CD is a high-capacity, oil-free circulating water vacuum pump engineered for continuous, multi-point vacuum generation in academic, pharmaceutical, and industrial R&D laboratories. Unlike traditional oil-sealed rotary vane pumps, this unit operates on the principle of water-ring vacuum generation—where centrifugal force from a rotating stainless steel impeller forms a liquid seal within the pump chamber, enabling efficient gas evacuation without lubricating oil. Its design integrates an internal recirculating cooling loop and external water inlet/outlet capability, allowing operation with tap water or closed-loop deionized water systems. The SHZ-CD supports simultaneous vacuum delivery to up to five independent ports, each rated for 10 L/min at a stable ultimate vacuum of 0.098 MPa (equivalent to ~735 Torr), making it suitable for moderate-vacuum applications including rotary evaporation, vacuum filtration, vacuum drying ovens, and suction-based sample handling.

Key Features

• Five independently controllable vacuum ports—enabling parallel operation across multiple instruments or processes without cross-contamination.
• Full 304 stainless steel wetted components (pump body, impeller, water distributor) ensure long-term resistance to corrosion from acidic, alkaline, or organic vapors commonly encountered during solvent evaporation or chemical synthesis.
• Oil-free operation eliminates risk of hydrocarbon contamination in vacuum lines and downstream apparatus—critical for analytical sample preparation and cleanroom-compatible workflows.
• Integrated 50 L water reservoir with level indicator and overflow protection; optional external water supply connection for extended runtime under high thermal load conditions.
• Low-noise motor assembly (≤62 dB(A) at 1 m) and vibration-dampened mounting reduce acoustic interference in shared lab spaces.
• Thermally stable design maintains consistent vacuum performance over prolonged operation—validated for continuous duty cycles exceeding 8 hours at ambient temperatures up to 35°C.

Sample Compatibility & Compliance

The SHZ-CD is compatible with standard laboratory glassware fittings (e.g., 10/15/19/24 standard taper joints) and accepts common vacuum tubing (ID 6–10 mm). Its stainless steel construction complies with ISO 8502-3 for surface cleanliness and resists degradation from common solvents including acetone, ethanol, ethyl acetate, and dilute HCl or NaOH solutions. While not certified to UL or CE for export markets without additional regional conformity assessment, the unit adheres to IEC 61010-1 safety standards for electrical equipment used in laboratory environments. It supports Good Laboratory Practice (GLP) documentation requirements through stable, repeatable vacuum output and mechanical simplicity—no firmware or digital controls that require 21 CFR Part 11 validation.

Software & Data Management

The SHZ-CD is a manually operated, analog device with no embedded microcontroller, display, or data logging capability. This architecture ensures operational reliability, eliminates firmware update dependencies, and avoids cybersecurity vulnerabilities associated with connected instrumentation. Vacuum pressure is monitored externally using calibrated analog or digital vacuum gauges (e.g., Pirani or capacitance manometers), which may be integrated into user-defined data acquisition systems via 0–5 V or 4–20 mA analog outputs (when paired with compatible transducers). No proprietary software is required or provided; system integration follows standard industrial signal protocols.

Applications

• Routine rotary evaporation of heat-sensitive compounds under reduced pressure.
• Vacuum-assisted gravity or pressure-driven filtration of colloidal suspensions and particulate-laden reaction mixtures.
• Desiccation of hygroscopic solids in vacuum desiccators equipped with dual-port manifold adapters.
• Supporting Schlenk line operations where moderate vacuum levels suffice for inert atmosphere purging.
• Providing centralized vacuum to multiple fume hood-mounted traps or cold finger condensers in synthetic chemistry labs.
• Preparation of samples for XRD, SEM, or TGA analysis requiring moisture-free handling environments.

FAQ

Is the SHZ-CD suitable for use with aggressive solvents such as chloroform or concentrated nitric acid?
The 304 stainless steel construction provides robust resistance to many organic solvents and mild acids, but prolonged exposure to halogenated solvents or strong oxidizers may accelerate localized pitting. Use with such media requires verification against ASTM G46 and periodic visual inspection of wetted surfaces.
Can the pump operate continuously for 24 hours?
Yes—under ambient temperatures ≤30°C and with adequate water circulation (either recirculated or fresh tap water), the SHZ-CD is rated for uninterrupted operation. Thermal cutoff protection engages if internal temperature exceeds safe thresholds.
Does the unit include a vacuum gauge?
No. A separate vacuum measurement device must be installed in the vacuum line to monitor actual system pressure.
What maintenance is required?
Routine tasks include monthly inspection of water quality (pH 6.5–8.5 recommended), quarterly cleaning of the reservoir and impeller chamber with citric acid solution, and annual verification of motor insulation resistance per IEEE 43.
Is external water cooling mandatory?
Not mandatory, but recommended when operating above 30°C ambient or during extended (>4 h) high-load sessions to maintain stable vacuum and prevent cavitation.