Risan two-stage PM VSD screw — RK V-II selection — Risan Electric — Wenling screw compressors

Datasheet

Product overview

Power: Exact offered motor/package input required · Pressure: Selected examples: 0.8 MPa · Flow: RK20/50/100V-II: 2.9 / 7.1 / 16.5 m³/min

Risan's 创优 two-stage PM VSD page lists RK V-II parameter columns separately from the single-stage RK machines. The selected RK20V-II row gives 2.9 m³/min at 0.8 MPa, RK50V-II gives 7.1 m³/min and RK100V-II gives 16.5 m³/min at the same stated pressure. For RK50V-II, the four published pairs are 7.2/0.7, 7.1/0.8, 6.3/1.0 and 5.4/1.3 in m³/min / MPa. They are actual column/row pairs, not independent family maxima.

Both two-stage tables list direct drive and 380 V / 50 Hz with frequency-conversion starting. RK50V-II's selected dimensions are 1770 × 1110 × 1560 mm, listed mass 860 kg and R1½ outlet. Larger columns do not all share the 1.3 MPa row: the RK430V-II and RK480V-II final rows instead show 1.2 MPa. Do not assign one pressure range or infer monotonic capacity for the complete family. The original picture is labelled RK100VBL-II, while the tables use RK100V-II; agree the full current suffix and duty sheet.

Compare a proposed two-stage selection with the single-stage alternative using the same volume-reference conditions, discharge requirement and real load cycle. A larger published flow alone proves neither a saving nor a complete power comparison. Ask for whole-package input, control/turndown limits, cooling and inlet conditions, noise test basis, electrical options and maintenance access. Establish treatment, receiver/piping, commissioning and wear-part scope before approving the installation.

Catalog reference	RISAN-TWOSTAGE
Machine	Rotary screw
Power	Exact offered motor/package input required
Working pressure	Selected examples: 0.8 MPa
Published flow	RK20/50/100V-II: 2.9 / 7.1 / 16.5 m³/min
Air quality	—
Duty	General industry
Supply	Not specified
Plant	Risan Electric — Wenling screw compressors
Architecture	Two-stage PM VSD screw
Selected RK20V-II	2.9 m³/min at 0.8 MPa
Selected RK50V-II	7.1 m³/min at 0.8 MPa
Selected RK100V-II	16.5 m³/min at 0.8 MPa
RK50V-II rows	7.2/0.7; 7.1/0.8; 6.3/1.0; 5.4/1.3 (m³/min / MPa)
RK50V-II listed dimensions/mass	1770 × 1110 × 1560 mm; 860 kg
RK50V-II outlet	R1½
Published supply/drive	380 V / 50 Hz; direct drive
Scope	Larger-family pressure rows vary; reference conditions and full suffix required
Image	Original RK100VBL-II family view, not a universal duty rating