RIKEN KEIKI GD-D5C Pump with Nidec Servo IH6S3N-500 Motor

RIKEN KEIKI GD-D5C Gas Sampling Suction Pump with NIDEC SERVO IH6S3N-500 Induction Motor

The RIKEN KEIKI GD-D5C is a specialized, high-reliability gas sampling suction pump assembly integrated with a precision-engineered Nidec Servo Corporation IH6S3N-500 (HMKII Series) 4-pole single-phase AC induction motor. Built in Japan for demanding marine, offshore, and hazardous industrial monitoring environments, this suction pump unit is engineered to extract continuous sample gas streams from target areas (such as cargo holds, pump rooms, inert gas systems, paint lockers, and enclosed compartments) and deliver them across catalytic, semiconductor, or electrochemical detector heads.

Model Details

• Pump Model: GD-D5C
• Pump Assembly Part Number (MPN): 0Y5040021FM / RKP-20130
• Motor Model: Nidec Servo IH6S3N-500 (HMKII Series)
• Country of Origin: Japan
• Cross-References / Replaces: RIKEN KEIKI RKP-20130, GD-D58 suction pump modules, Nidec IH6S3N series 100V 3W motor assemblies.

Technical Specifications: RIKEN KEIKI GD-D5C Suction Pump

Key Features

1. Continuous-Duty Industrial Motor: Fitted with the Nidec Servo HMKII IH6S3N-500 4-pole induction motor rated for continuous 24/7 duty cycles with Class E insulation and 1500VAC/1-min dielectric protection.
2. Stable Flow Delivery: Delivers non-pulsing, steady suction performance designed specifically to maintain calibrated velocity across delicate gas sensor heads.
3. Low Noise & Minimal Vibration: Precision-balanced dynamic rotor prevents micro-vibrations from interfering with sensitive catalytic bead and optical gas detector elements.
4. Direct Drop-In Integration: Matches factory bolt patterns and pneumatic ports for direct field replacement in RIKEN KEIKI extractive gas detection cabinets and sampling panels.
5. Marine-Grade Build: Corrosion-resistant casing and industrial-grade diaphragms/seals prevent degradation in saline and hydrocarbon-laden marine atmospheres.

System Compatibility

• Riken Keiki Detector Heads: GD-D5C, GD-D58 series, GD-A80 series, GD-81D series suction systems.
• Gas Sampling Panels: Riken Keiki SP-200 / RKP suction sampling units and multi-point gas sampling racks.
• OEM Drop-In: Compatible with custom marine analysis consoles requiring a compact 100V 50/60Hz continuous suction drive.

Applications

• Marine & Offshore: Extractive sampling for hydrocarbon gas detection in tanker pump rooms, ballast tanks, void spaces, and cargo compressor rooms.
• Inert Gas Systems (IGS): Oxygen O2 and carbon monoxide CO continuous extraction monitoring prior to tank entry.
• Industrial Plants: Chemical processing plants, semiconductor cleanroom gas pipelines, and wastewater pump stations requiring continuous combustible/toxic gas draw.

Frequently Asked Questions

What should I do if the gas detector signals a continuous low-flow fault alarm after replacing the pump?

Check that the suction and discharge tubing are free of blockages and ensure the running capacitor is rated at 1.0 μF. A low-flow fault occurs when the motor RPM drops or downstream pneumatic backpressure is too high.

Can this pump motor run continuously on 60 Hz marine electrical systems?

Yes. The Nidec Servo IH6S3N-500 is dual-frequency rated for 50 Hz (1,300 RPM) and 60 Hz (1,600 RPM) at 100V AC continuous operation.

Is the GD-D5C suitable for direct mounting in hazardous classified zones?

The pump and motor assembly are designed for installation inside certified flameproof or purged enclosures (such as RIKEN KEIKI GD-D58 flameproof suction cabinets). Verify the host cabinet’s Ex rating before field wiring.