Type W

Premium range Air Pressure Control Valves for the control of room pressure
in Pharmaceutical and electronics manufacture, specialist laboratories.

Range of units for 50 mm, 100 mm and 175 mm thick walls.

Wall Sleeve allows withdrawal of valve for maintenance and cleaning without the need for tools.

Choice of heavy duty white Polyester coated carbon steel body for excellent chemical resistance and ease of cleaning or Grades 304 or 316 Stainless steel body.

Blades and internal parts : Grade 304 or Grade 316 Stainless steel.

Blades pivoted on sealed for life bearings.

Pressure ranges : 5 - 35 Pa or 30 - 50 Pa.

Ease of site adjustment of pressure setting.

Fire and combined fire/smoke rated units available.

Selection procedure.

Type W valves are manufactured in five sizes, 50W and 50WL for 50 mm thick walls,
100W and 100WL for 100 mm thick walls and 200W for 175 mm thick and greater walls.
Use Telescopic sleeves for intermediate thicknesses.

Type W selection chart.

Establish the valve suitable for your wall thickness, operating pressure and airflow and select from the chart below.

Airflow in m³/s against differential pressure in Pa.
Pa	50W	50WL	100W	100WL	200W
5	0.025	0.036	0.042	0.082	0.106
8	0.032	0.046	0.053	0.100	0.131
10	0.035	0.050	0.059	0.110	0.149
11	0.037	0.053	0.062	0.118	0.156
14	0.042	0.060	0.071	0.137	0.177
15	0.043	0.062	0.073	0.141	0.183
20	0.050	0.071	0.084	0.178	0.211
22	0.053	0.076	0.089	0.183	0.221
25	0.056	0.080	0.094	0.190	0.236
30	0.062	0.088	0.103	0.212	0.259
32	-		0.106	0.216	0.264
35	-	-	0.112	0.222	0.285
40	-	-	0.121	0.228	0.311
45	-	-	0.131	0.237	0.335
50	-	-	0.140	0.251	0.357

Dimensions - Valves and Wall Sleeves
Valve	A	B	C	D	E	F	G	Aperture
50W	50	150	389	384	144	52	119	365w x 125h
50WL	50	150	528	523	144	52	119	504w x 125h
100W	100	190	393	384	181	105	157	365w x 162h
100WL	100	190	638	629	181	105	157	610w x 162h
200W	170	300	505	495	292	175	258	467w x 264h

Multiple units of Wall Sleeves are available - Please request drawing.

Telescopic Wall Sleeves

Dimensions - Telescopic Wall Sleeves
Valve	A	B	C	D	X	Aperture
50W	144	153	384	393	52	385 w x 134 h
50WL	144	153	523	532	52	523 w x 135 h
100W	181	190	384	393	105	384 w x 171 h
100WL	181	190	629	638	105	629 w x 171 h
200W	292	302	495	505	175	487 w x 274 h

Type W Fire rated air

Pressure control valves

Fire Rated air pressure control valve dimensions

Type W Fire rated dimensions
Carbon steel body					Stainless steel body
Valve	A	B	C	Aperture	Valve	A	B	C	Aperture
100W	425	268	222	437x 234	100W	450	295	220	462 x 232
100WL	670	268	222	682 x 234	100WL	668	295	220	680 x 232
200W	510	340	305	522 x 317	200W	600	340	340	615 x 355