Twinflow STD

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STD

8 standard sizes from 100mm to 500mm
Air volume flow rates up to 1.23m³/s (AC) / 1.82m³/s (EC)
Static pressures of up to 570 Pa (AC) / 1028 Pa (EC)
Suitable for operating temperatures up to 60+°C
Extensive range of stock is avaliable.

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The Twinflow STD...EC incorporates the BAT (Best Available Technology) Vpro backward curved impeller, with three dimensional profiled blades powered by the ultra reliable Ziehl-Abegg EC (electronically commutated) external rotor motor. The range of in-line centrifugal twin fans, designed to overcome space restrictions, is suitable for internal mounting.

FEATURES & BENEFITS

Learn more about individual features and benefits of our products.

SPECIFICATION

The Twinflow STD range of centrifugal fans as manufactured by Elta Fans Ltd.

TECHNICAL INFORMATION

The technical information available to you from ELTA Fans is exhaustive - Choose from either sound, performance and electrical or dimensional data for each and every product

ACCESSORIES

Elta supply a full range of accessories for each of their products.

COMPARE

Choose up to three products to compare their features side-by-side.

DOWNLOADS

Get the full brochure, wiring diagrams and operation and maintenance instructions.

Features & Benefits

Ease of installation.

All models are designed for direct connection to standard diameter flexible or rigid circular ducting with 50 mm long spigots with EPDM rubber U shaped seals for ease of connection.

Material strength

A robust, yet lightweight unit with a galvanised sheet steel casing.

Performance

High efficiency low tonal noise backward curved centrifugal impellers are directly driven by an AC or EC external rotor motor, designed to be non-overloading and provide high performance characteristics. STD units are fitted with a non return damper for elimination of short circuiting of air within the casing.

Mounting

Each unit is supplied with integral mounting brackets.

Design appeal

Ideal for roof spaces and / or where space is at a premium.

Quality assurance

All units are designed and manufactured with procedures as defined in BS EN ISO 9001: 2008.

Warranty

Each STD has a 12 month warranty.

Specification

The Twinflow STD range of direct drive twin fans as manufactured by Elta Fans Ltd. 46 Third Avenue, Pensnett Trading Estate, Kingswinford, West Midlands DY6 7US, UK, Tel: +44 (0) 1384 275800 - If you need more information - Contact us.

Casing

Robust 1.2mm galvanised mild steel sheet casing. The casing is specially manufactured using integral motor mounting plates to provide additional rigidity for the casings. Each casing provides a suitably sized circular spigot to suit the duct size required. EPDM (Ethylene Propylene) rubber U shaped seals (being ozone and UV stable) are used to ensure a good seal back to the duct that is to be attached. Top & bottom access is provided as a standard feature to facilitate ease of maintenance and cleaning

Motors

The twin range of units may have either an EC or AC twin rotor motor fitted as standard. The motor contains sealed for life bearings. Thermal Class of motors to THCL 130 or 155 dependent on size Manufactured by Ziehl-Abegg providing increased reliability. All motors are suitable for use in ambient air conditions up to 60°C.

Impellers

High efficiency low tonal noise backward curved centrifugal impeller, dynamically balanced to Grade 6.3 and directly driven by the motor to provide a smooth airflow through the unit.

Quality Management

All units in the Elta range are designed and manufactured to procedures as defined in BS EN ISO 9001:2000. They are also tested in accordance with BS848 Part 2 1985 (sound performance) and ISO 5801:2007 (airside performance).

Technical Infomation

Dimensional Data

Product Code	A	B	C	D	E	F	G	Weightkg
STD100	570	555	265	100	537	575	600	25
STD125	570	555	265	125	537	575	600	25
STD150	570	555	265	150	537	575	600	25
STD200	607	657	305	200	569	667	702	32
STD250	607	657	335	250	569	667	702	35
STD315	755	869	405	315	702	889	914	55
STD400	851	1024	477	400	700	1069	1119	82
STD500	993	1259	606	500	800	1304	1354	116

Performance & Electrical Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz

Product Code	Control Voltage	Speed r/min	Airflow SFP	Airflow m³/s @ Static Pressure Pa.												Overall Efficiency %	FMEG	Motor Electrical Data
				Airflow m³/s @ Static Pressure Pa.														Motor Electrical Data
				0	25	50	75	100	150	200	250	300	350	400	500			FLC Amps	Input kW
				0	25	50	75	100	150	200	250	300	350	400	500			FLC Amps	Input kW
STD100-1EC	10V	3467	m³/s	0.103	0.102	0.1	0.098	0.096	0.092	0.087	0.082	0.076	0.07	0.062	0.044	24	N43	1.23	0.14
STD100-1EC	10V	3467	W/L/s)	1.26	1.29	1.32	1.36	1.39	1.47	1.56	1.66	1.78	1.92	2.1	2.76	24	N43	1.23	0.14
STD125-1EC	10V	3445	m³/s	0.123	0.121	0.118	0.115	0.112	0.106	0.1	0.092	0.084	0.075	0.065	0.037	24.3	N43	1.21	0.151
STD125-1EC	10V	3445	W/L/s)	1.16	1.18	1.2	1.22	1.25	1.31	1.38	1.47	1.59	1.76	2.01	3.39	24.3	N43	1.21	0.151
STD150-1EC	10V	3450	m³/s	0.146	0.143	0.14	0.137	0.133	0.125	0.116	0.107	0.098	0.089	0.079	0.057	28.2	N47	1.17	0.134
STD150-1EC	10V	3450	W/L/s)	0.91	0.93	0.94	0.96	0.99	1.05	1.12	1.22	1.35	1.49	1.68	2.31	28.2	N47	1.17	0.134
STD200-1EC	10V	3348	m³/s	0.274	0.267	0.261	0.254	0.248	0.235	0.221	0.208	0.194	0.179	0.164	0.13	32.8	N49	1.9	0.24
STD200-1EC	10V	3348	W/L/s)	0.81	0.84	0.87	0.9	0.93	0.99	1.06	1.14	1.23	1.33	1.45	1.81	32.8	N49	1.9	0.24
STD250-1EC	10V	2390	m³/s	0.33	0.32	0.31	0.3	0.28	0.25	0.22	0.19	0.16	0.13	0.1	0.05	29.8	N48	1.89	0.223
STD250-1EC	10V	2390	W/L/s)	0.58	0.6	0.62	0.65	0.67	0.75	0.85	0.99	1.19	1.48	1.97	4.18	29.8	N48	1.89	0.223
STD315-1EC	10V	2011	m³/s	0.63	0.61	0.6	0.59	0.58	0.55	0.52	0.49	0.45	0.41	0.36	0.22	42	N56	1.96	0.428
STD315-1EC	10V	2011	W/L/s)	0.61	0.63	0.65	0.67	0.69	0.74	0.79	0.85	0.92	0.99	1.1	1.55	42	N56	1.96	0.428
STD400-1EC	10V	2201	m³/s	1.07	1.06	1.04	1.02	1	0.97	0.93	0.89	0.86	0.82	0.78	0.7	46.9	N57	4.25	0.914
STD400-1EC	10V	2201	W/L/s)	0.8	0.82	0.83	0.85	0.87	0.9	0.94	0.98	1.02	1.07	1.12	1.25	46.9	N57	4.25	0.914
STD500-1EC	10V	1429	m³/s	1.45	1.42	1.39	1.36	1.33	1.25	1.17	1.09	1	0.91	0.82	0.62	49.1	N60	3.5	0.774
STD500-1EC	10V	1429	W/L/s)	0.49	0.5	0.52	0.53	0.55	0.6	0.65	0.7	0.77	0.84	0.92	1.17	49.1	N60	3.5	0.774

THREE Phase - 380V-480V / 50Hz / 60Hz

Product Code	Control Voltage	Speed r/min	Airflow SFP	Airflow m³/s @ Static Pressure Pa.												Overall Efficiency %	FMEG	Motor Electrical Data
				Airflow m³/s @ Static Pressure Pa.														Motor Electrical Data
				0	25	50	75	100	150	200	250	300	350	400	500			FLC Amps	Input kW
				0	25	50	75	100	150	200	250	300	350	400	500			FLC Amps	Input kW
STD500-3EC	10V	1800	1.819	1.797	1.774	1.751	1.727	1.677	1.625	1.57	1.512	1.453	1.392	1.265	0.62	51.8	N60	2.29	1.482

SINGLE Phase - 220V-240V / 50Hz

Product Code	Control Voltage	Speed r/min	Airflow SFP	Airflow m³/s @ Static Pressure Pa.												Overall Efficiency %	FMEG	Motor Electrical Data
				Airflow m³/s @ Static Pressure Pa.														Motor Electrical Data
				0	25	50	75	100	150	200	250	300	350	400	500			FLC Amps	Input kW
				0	25	50	75	100	150	200	250	300	350	400	500			FLC Amps	Input kW
STD100-1AC	10V	2510	m³/s	0.075	0.073	0.07	0.067	0.063	0.055	0.046	0.035	0.02				14.1	N36	0.35	0.075
STD100-1AC	10V	2510	W/L/s)	1	1.03	1.07	1.12	1.17	1.33	1.56	1.99	3.39				14.1	N36	0.35	0.075
STD125-1AC	10V	2517	m³/s	0.093	0.09	0.087	0.084	0.079	0.069	0.057	0.044	0.021				16.7	N39	0.35	0.076
STD125-1AC	10V	2517	W/L/s)	0.81	0.83	0.86	0.89	0.94	1.07	1.28	1.65	3.18				16.7	N39	0.35	0.076
STD150-1AC	10V	2479	m³/s	0.111	0.107	0.103	0.098	0.093	0.081	0.065	0.046	0.022				18.7	N41	0.34	0.075
STD150-1AC	10V	2479	W/L/s)	0.65	0.68	0.71	0.75	0.79	0.91	1.11	1.54	2.95				18.7	N41	0.34	0.075
STD200-1AC	10V	2543	m³/s	0.216	0.209	0.202	0.195	0.186	0.169	0.151	0.131	0.11	0.086	0.057		22.6	N41	0.68	0.155
STD200-1AC	10V	2543	W/L/s)	0.67	0.7	0.73	0.77	0.81	0.9	1.01	1.16	1.37	1.71	2.45		22.6	N41	0.68	0.155
STD250-1AC	10V	2424	m³/s	0.33	0.32	0.31	0.29	0.28	0.25	0.23	0.2	0.17	0.14	0.1	0.04	23.8	N41	0.96	0.22
STD250-1AC	10V	2424	W/L/s)	0.64	0.66	0.69	0.72	0.76	0.85	0.96	1.1	1.29	1.56	1.97	3.94	23.8	N41	0.96	0.22
STD315-1AC	10V	1263	m³/s	0.4	0.38	0.36	0.33	0.3	0.23	0.14	0.03					22.5	N41	0.75	0.159
STD315-1AC	10V	1263	W/L/s)	0.39	0.41	0.44	0.48	0.53	0.69	1.04	4.25					22.5	N41	0.75	0.159
STD400-1AC	10V	1379	m³/s	0.71	0.68	0.66	0.63	0.59	0.51	0.43	0.35	0.25	0.05			31.5	N47	1.48	0.299
STD400-1AC	10V	1379	W/L/s)	0.38	0.39	0.42	0.44	0.48	0.56	0.67	0.81	1.09	4.6			31.5	N47	1.48	0.299
STD500-1AC	10V	1214	m³/s	1.23	1.19	1.14	1.09	1.05	0.95	0.85	0.74	0.63	0.5	0.36	0.05	30.5	N43	2.94	0.649
STD500-1AC	10V	1214	W/L/s)	0.5	0.51	0.54	0.56	0.59	0.65	0.74	0.85	1.01	1.26	1.69	11.1	30.5	N43	2.94	0.649

Sound Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz

ProductCode		In-Duct Sound Power Level dBW @ Octave Band Hz								dBA @ 3m
ProductCode		63Hz	125Hz	250Hz	500Hz	1 k Hz	2 kHz	4 kHz	8 kHz	dBA @ 3m
STD100-1EC	Inlet	73	78	76	70	60	57	56	53	51
	Outlet	76	76	73	70	68	60	53	49	52
	Breakout	58	61	63	61	61	54	51	48	44
STD125-1EC	Inlet	79	77	77	72	62	60	56	55	52
	Outlet	80	74	78	72	69	61	56	55	54
	Breakout	58	58	66	63	60	56	51	48	45
STD150-1EC	Inlet	82	76	76	72	63	63	60	57	53
	Outlet	79	75	76	71	69	63	60	57	53
	Breakout	60	61	67	66	61	57	52	48	46
STD200-1EC	Inlet	83	79	78	77	69	65	62	64	57
	Outlet	86	83	80	76	71	66	62	60	57
	Breakout	65	65	71	71	66	61	56	54	51
STD250-1EC	Inlet	79	74	77	71	62	59	57	56	52
	Outlet	80	77	76	69	65	62	58	55	52
	Breakout	61	65	72	65	61	57	46	43	47
STD315-1EC	Inlet	76	76	81	71	63	60	58	55	54
	Outlet	78	76	77	73	65	62	59	55	53
	Breakout	68	70	74	69	64	59	52	50	50
STD400-1EC	Inlet	83	80	86	74	70	69	67	65	59
	Outlet	84	80	82	83	75	73	68	65	62
	Breakout	74	73	79	73	69	66	59	59	55
STD500-1EC	Inlet	78	83	75	66	63	61	58	56	51
	Outlet	77	81	74	73	68	64	60	56	54
	Breakout	74	79	76	72	67	61	54	52	53

Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The In-Duct Sound Power Level Spectra are in dB re-1pW. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only.

SINGLE Phase - 220V-240V / 50Hz

ProductCode		In-Duct Sound Power Level dBW @ Octave Band Hz								dBA @ 3m
ProductCode		63Hz	125Hz	250Hz	500Hz	1 k Hz	2 kHz	4 kHz	8 kHz	dBA @ 3m
STD100-1AC	Inlet	63	72	70	60	50	49	48	43	43
	Outlet	69	68	69	60	57	51	48	44	43
	Breakout	51	52	60	52	52	46	41	31	36
STD125-1AC	Inlet	65	68	70	65	52	51	48	45	45
	Outlet	72	66	70	60	58	53	47	39	44
	Breakout	48	51	60	55	52	47	43	38	37
STD150-1AC	Inlet	71	69	70	64	53	53	51	47	45
	Outlet	75	71	73	61	60	55	51	46	47
	Breakout	54	55	62	55	53	48	43	37	38
STD200-1AC	Inlet	76	75	77	71	62	58	57	56	52
	Outlet	77	77	74	71	63	59	56	54	51
	Breakout	59	63	66	62	58	53	49	47	43
STD250-1AC	Inlet	80	75	80	72	64	60	58	57	54
	Outlet	78	77	75	71	66	63	58	56	52
	Breakout	57	63	72	66	61	54	47	45	47
STD315-1AC	Inlet	66	74	64	56	46	47	44	35	41
	Outlet	68	74	57	58	55	49	45	36	41
	Breakout	60	69	61	56	51	45	38	31	38
STD400-1AC	Inlet	73	79	71	63	57	57	55	49	47
	Outlet	75	79	65	67	60	57	55	48	48
	Breakout	62	71	63	61	58	53	49	47	43
STD500-1AC	Inlet	76	82	73	63	59	58	55	55	49
	Outlet	75	82	70	69	63	60	57	53	51
	Breakout	73	77	70	66	61	55	50	47	48

Silencer Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz

ProductCode		dBA Attenuation
ProductCode		300L	600L	900L	1200L
STD100-1EC	Inlet	-10	-15	-20	-22
STD100-1EC	Outlet	-13	-18	-23	-25
STD125-1EC	Inlet	-10	-15	-20	-23
STD125-1EC	Outlet	-11	-16	-21	-24
STD150-1EC	Inlet	-9	-14	-18	-20
STD150-1EC	Outlet	-11	-16	-19	-22
STD200-1EC	Inlet	-10	-14	-18	-21
STD200-1EC	Outlet	-9	-13	-16	-19
STD250-1EC	Inlet	-8	-12	-14	-17
STD250-1EC	Outlet	-8	-12	-14	-17
STD315-1EC	Inlet	-7	-10	-12	-15
STD315-1EC	Outlet	-9	-11	-14	-17
STD400-1EC	Inlet	-6	-9	-11	-14
STD400-1EC	Outlet	-10	-12	-15	-19

SINGLE Phase - 220V-240V / 50Hz

ProductCode		dBA Attenuation
ProductCode		300L	600L	900L	1200L
STD100-1AC	Inlet	-9	-14	-19	-21
STD100-1AC	Outlet	-11	-16	-21	-23
STD125-1AC	Inlet	-10	-16	-20	-23
STD125-1AC	Outlet	-10	-15	-20	-22
STD150-1AC	Inlet	-8	-14	-17	-20
STD150-1AC	Outlet	-8	-13	-16	-19
STD200-1AC	Inlet	-8	-12	-16	-19
STD200-1AC	Outlet	-9	-13	-17	-20
STD250-1AC	Inlet	-8	-12	-14	-17
STD250-1AC	Outlet	-9	-13	-15	-18
STD315-1AC	Inlet	-5	-7	-9	-11
STD315-1AC	Outlet	-6	-8	-10	-12
STD400-1AC	Inlet	-5	-7	-9	-12
STD400-1AC	Outlet	-6	-8	-10	-13

SINGLE Phase - 200V-277V / 50Hz / 60Hz

ProductCode		dBA Attenuation
ProductCode		1DENP	2DENP
STD400-1EC	Inlet	-7	-11
STD400-1EC	Outlet	-8	-14

SINGLE Phase - 220V-240V / 50Hz

ProductCode		dBA Attenuation
ProductCode		1DENP	2DENP
STD500-1AC	Inlet	-6	-10
STD500-1AC	Outlet	-7	-12

THREE Phase - 380V-480V / 50Hz / 60Hz

ProductCode		dBA Attenuation
ProductCode		1DENP	2DENP
SQS500-3ECL	Inlet	-7	-13
SQS500-3ECL	Outlet	-9	-15

Wiring Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz

THREE Phase - 380V-480V / 50Hz / 60Hz

ProductCode	WiringDiagram No.
STD500-3EC	152-2MOE03K3*

* Please contact Elta Fans for more information.

SINGLE Phase - 220V-240V / 50Hz

Fast Clamps (018)

For quick connection of spigotted fans to circular duct or accessories
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Silencers (068-JF)

Pre-galvanised sheet steel with perforated steel lining
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Silencers (068-D**P)

Pre-galvanised sheet steel with perforated steel lining
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Av Mounts (Rubber)

Spring AV mounts - zinc plated steel, rubber insert and foot pad
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Flexible Connectors (018)

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Panel Filters (018)

Filter access with removable panel
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Electric Heater Batteries

Safe and clean heating
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Auto Changeover Panels

Auto Changeover Panels
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