Roots pump

Vacuum Pump Roots Pump WS/WSU251 Mechanical Booster Pump Maintenance

WS/WSU251 RUVAC vacuum pump RUVACWS/WSU251-2001 series roots vacuum pump with air-cooled tank motor WS/WSU series roots vacuum pump is a mature vacuum acquisition equipment, widely used in various vacuum applications. In conjunction with the backing pump to form the roots unit, it has the following advantages: reduce the ultimate pressure According to general experience, the limit pressure of the system is reduced to 1/10 of the original after configuring the roots vacuum ticket. The combination of two-stage roots and the corresponding backing pump can achieve ultimate pressures in the order of 10-5 mbar (0.75 x 10-5 Torr), and in some cases there is no need for a high vacuum pump (turbomolecular pump, or diffusion pump). Increased pumping speed due to the non-jointed rotor

Item NO :
WS/WSU251; WS/WSU501; WS/WSU1001;WS/WSU2001

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Product Details

Vacuum Pump Roots Pump WA/WAU251 Mechanical Booster Pump Maintenance

Roots pumps – reliable, safe and durable

1. Proven and mature technology

RUVAC series roots pumps, which have been around for decades, have proven their ability to perform in a wide range of vacuum applications.

When used in tandem with an oil or dry backing pump, the rotary booster can significantly increase the pumping speed of the system and increase the vacuum that the system can generate, thereby extending the operating range of the backing pump. Roots pump has 3 series: WA series with air-cooled flange motor; WS series with tank air-cooled motor; The WH series adopts a fully sealed water-cooled motor. Each series contains different pumping speeds for different applications. All three series of roots pumps are available in versions with or without bypass valves, also known as pressure balancing valves.

01, RUVAC rotary lobe can be used for horizontal or vertical flow installation, which can improve the flexibility of the system, and the installation position can be changed during installation.

02, the bearing of RUVAC Roots pump and its durability, connected to it is the efficient lubrication system of Roots Pump, which ensures the silence and stability of Roots Booster during operation.

03, WS and WSU series roots pump motor, the rotor is sealed by the tank in a vacuum separated from the stator.

Since no drive shaft is connected from the outside to the inside, the rotor can be optimally sealed in a vacuum.

Thanks to an efficient lubrication system, the WS series roots pumps can run at speeds of up to 6000 RPM

This means that the WA(U) series can achieve higher pumping speeds for the same size vacuum pump while meeting the IE3 energy efficiency requirements

Technlcal Data		WS/WSU 251		WS/WSU(H)601
Technlcal Data		60 Hz	60 Hz	60 Hz	60 Hz
Nomlnal pumplng speed	m²/h(ctm)	253(149)	304 (179)	505 (297.4)	606 (357)
Max olfoctivo pumplng spood	m/h (cfm)	210.0(123.7)	251.0(148.0）	410.（241）	530（312）
with bookdng pump	TRIVAC SOGEVAC	D65B	D 65B	SV200	SV200
UUmale total pressure	mbar (Tom)	<Bx10¹(<6x105	<8x10⁴(<6x109	<4x10²(<3x109	<4x10²(<3x10)
Mox pemlsslble prossure difforence during conunuous operalon mbar(Tom)	80.0(60.0
Lenk rale,Inlegral	mbar xVe	<1x104
Malng aupply	V	200/230/400	200-208/265/460	200/230/400	200-208/265/460
Themal cass		F
Pemlsslble amblent lemperatures	CCF	n+5 to +40(+41 to+104)
Molor power	kW ho)	1.1（1.5)	1.4(1.9)	2.2（3.0)	2.4（3.3）
Nomlnal soeod.8porox	pm	3000	3000	3000	3500
Mnx.pormlasIblo spoed	pm	6000
Typeof prolecUon	IP	20
Lubnoant for tho boartng chambor LVO400
vortionl pumplng aclon,approx horizontalpumplng octlon,opprox	I(qt) I(qt)	0.55 (0.58) 0.45 (0.48)	0.55 \|0.58) 0,45 (0.48)	0.76 (0.79) 0.7 (0.74)	0.76 (0.79) 0.7 (0.74)
other ols vortlool pumplng aolon,opprox	I(qt)	0.6 (0.63)	0.6 (0.63)	0.8 [0.85]	0.8 [0.85]
horlzontnl pumplng octlon,opprox	I(qt)	0.45 (0.48)	0.45 (0.48)	0.7 (0.74)	0.7 (0.74)
Connectlon langes	DN	63 SO-K
Welght WS /WSU	kg (lbs)	90/95 (198.6/200.5	80/85 (188.5/209.6	130/135 (286.7/207.7	130/135 (288.7/207.7)
Nolse level	dB(A)	<58	<60	<52	<56

chnical Data		WS/WSU(H)1001		WS/WSU(H)2001
		50 Hz	60 Hz	50 Hz	60 Hz
Nominal pumping speed	m³/h (cfm)	1000 (589)	1200(707)	2050(1207.5)	2460(1449)
Max.effective pumping speed	m³/h (cfm)	800 (470)	1000 (588)	1850(1089)	2100(1236)
with backing pump	SOGEVAC	SV 300 B	SV 300 B	SV 630 BF	SV 630 BF
Ultimate total pressure	mbar(Tor)	<4×10²(<3x103)
Max.permissible pressure difference during continuous operation	mbar(Tor)	80.0 (60.0)	80.0 (60.0)	50.0(37.5)	50.0(37.5)
Leak rate,integral	mbar x l/s		<1x10⁴
Mains supply	V	200/230/400	200-208/265/460	200/230/400	200-208/265/460
Thermal class F
Permissible ambient temperatures	℃(F)	+5 to+40(+41 to +104)
Motor powe	kW (hp)	4.0 (5.4)	4.4 (6.0)	7.5(10.0)	8.5(11.6)
Nominal speed.approx.	rpm	3000	3600	3000	3600
Max.permissible speed	rpm	6000	6000	42004	42004
Type of protection	IP	20
Lubricant for the bearing chamber
LVO 400
vertical pumping action,approx horizontal pumping action,approx	1(qt) 1(qt)	1.75(1.85) 1.1(1.16)	1.75(1.85) 1.1(1.16)	2.7 (2.85 1.9 (2.00)	2.7 (2.85 1.9 (2.00)
other oils
vertical pumping action,approx	1(qt)	1.8(1.90)	1.8(1.90)	3.6 (3.81)	3.6 (3.81)
horizontal pumping action,approx	1(qt)	1.1(1.16)	1.1(1.16)	2.4 (2.54)	2.4 (2.54)
Connection flanges	DN	100 ISO-K	100 ISO-K	160 ISO-K	160 ISO-K
Weight WS /WSU	kg	228/233	228/233	458/465	458/465
	(lbs)	(502.7/513.8)	(502.7/513.8)	(1009.9/1025.3)	(1009.9/1025.3)
Noise level	dB(A)	<60	<60	<65	<67

2, intelligent series

The alcohol-tested RUVAC series of roots pumps is used in almost all vacuum applications, and we can supply standard roots pump systems with the TRIVAC series or SOGEVAC series, as well as standard dry systems for use with dry backing pumps such as DRYVAC and SCREWLINE.

uses roots technology for vacuum applications, and today RUVAC rotary lobe pumps meet all the process requirements in demanding vacuum applications.

01, RUVAC roots pumps are often used as "booster pumps" to help smaller backing pumps to evacuate larger chambers or to pump a better vacuum in the chamber.

02. Typical applications are heat treatment, industrial furnace, metallurgy and large-format coating.

03, RUVAC roots pump has become the standard in the architectural glass coating industry. Combined with SOGEVAC to form an oil-type system for evacuation of the injection chamber; It is also possible to form a purely dry system with DRYVAC or SCREWLINE for applications in the process room.

04, RUVAC rotary lobe pumps are often used to minimize evacuation time, such as in the injection chamber for coating applications or for fast-cycle food packaging applications

05, Roots pumps are used in lighting applications, which can pump the pressure below 10-3mbar in a very short time

06, RUVAC roots pumps are also commonly used in monocrystalline silicon pulling processes in solar cell or semiconductor applications. We will be happy to support you with product and application technology.