Data Sheet 810183-01
Issue Date: 04/06
Continuous Blowdown Valves
Reactomats
BA 28, BA 29, BA 210, BA 211
PN 63 – 320, DN 25 mm (1")
Description Connections
The valve is connected to the water space of the boiler. Butt-weld ends for pipe according to DIN 2448:
Precise adjustment of blowdown rate by turning regulating 30 x 2.6 to 4.5
lever on the calibrated scale plate (see charts on back page). 31.8 x 2.6 to 5
With the regulating lever in blow-off position the capacity is 33.7 x 3.6 to 6.3
approximately three times the capacity at scale division 100. 38 x 5.6 to 8
The BA includes a sampling valve for checking the boiler-wa- ANSI B 36.10: 1" Schedule 80 and 160
ter concentration. Other dimensions or weld-neck flanges on request at extra
cost.
Application
Continuous blowdown of steam boilers, evaporators, quench Design
coolers and similar installations. Regulating or dosing valve Straight-through valves with butt-weld ends, weld-neck
for all industries. flanges at extra cost. With GESTRA stage-nozzle, regulating
BA 28 – BA 211 lever, calibrated scale and sampling valve.
On request with electric actuator as BAE 28 – 211.
Range
If used as continuous blowdown valve (at saturation temperature):
BA 28 max. 63 bar g (915 psig)
BA 29 max. 94 bar g (1360 psig)
BA 210 max. 142 bar g (2060 psig)
BA 211 max. 226 bar g (3280 psig)
Max. temperature °C 120 200 250 300 350 400 450 500 530
BA 28 PN 63/100 barg 100 80 70 60 56 50 – – –
psig 1450 1160 1015 870 810 725 – – –
Max.
BA 29 PN 160*) barg 160 130 112 96 90 80 – – –
service
psig 2320 1885 1625 1390 1305 1160 – – –
pressure
BA 210 PN 250*) barg 250 200 175 150 140 125 – – –
psig 3625 2900 2540 2175 2030 1810 – – –
BA 211 PN 320*) barg 320 320 320 320 304 292 278 237 124
psig 4640 4640 4640 4640 4410 4235 4030 3435 1800
*) For relatively small capacities (see charts) use BA 29k, 210k or 211k with special stage nozzle.
Materials Order Specifications
BA 28 Valve type, nominal pressure (PN), nominal size (DN), c apacity,
Body (two parts): forged steel C 22.8 (No. 1.0460 DIN) service pressure, back pressure, fluid, application (e.g. type
Nozzle insert: cast stainless steel G-X 22 CrMoV 12 1 of boiler).
(1.4931) The following test certificates can be issued on request, at
Stage nozzle: stainless steel C 20 Cr 13 (1.4021) extra cost:
BA 29 In accordance with EN 10204-2.1, -2.2, -3.1A, -3.1B and
Body (two parts): C 22.8 (1.0460) -3.1C.
Nozzle insert*): G-X 22 CrMoV 12 1 (1.4931)
All inspection requirements have to be stated with the order.
Stage nozzle*): stainless steel X 8 CrTi 17 (1.4510)
After supply of the equipment certification cannot be esta-
BA 210 blished. For tests and inspection charges please consult us.
Lower-body part: C 22.8 (1.0460)
Upper-body part*): C 22.8 (1.0460) Enquiry Specification
Nozzle insert*): G-X 22 CrMoV 12 1 (1.4931)
Stage nozzle*): X 8 CrTi 17 (1.4510) Reactomats (continuous blowdown valves) with GESTRA
stage nozzle, regulating lever, calibrated scale and sampling
BA 211
valve.
Lower-body part: forged alloy steel 13 CrMo 44 (1.7335)
Upper-body part*): 13 CrMo 44 (1.7335) Application (optional) as continuous blowdown valve for steam
Nozzle insert*): G-X 22 CrMoV 12 1 (1.4931) boilers, evaporators and similar installations or as regulating/
Stage nozzle*): X 8 CrTi 17 (1.4510) dosing valve.
Indications on nominal pressure (PN), nominal size (DN), type
*) additionally armoured of connection, service pressure, back pressure, temperature,
fluid, application (e.g. type of boiler).
Continuous Blowdown Valves Types, Capacity, Scale Division Scale divisions for required capacity (blow-down quantity)
see charts.
Reactomats In blow-off position (regulating lever against stop) the ca-
BA 28, BA 29, BA 210, BA 211 Selection of valve type according to pressure and temperature pacity is approximately three times the capacity at scale
see under “Range”. division 100.
PN 63 – 320, DN 25 mm (1")
Chart 1: BA 28, 29, 210, 211 Differential pressure *)
Dimensions
BA 28 – 211 (approx. weight 21 kg)
max. 285
Hot-water capacity
Scale divisions
180
300 1)
For relatively small quantities (see dotted lines in chart) use BA 29k, 210k or 211k (with special stage nozzle).
Scale divisions according to chart 2.
2)
If the quantity of boiler water to be discharged is higher than the values covered by chart 1, GESTRA Reactomats
BA 39 with radial stage nozzle should be used.
128
Chart 2: BA 29k, 210k, 211k Differential pressure *)
Sampling valve with compression fitting 8 mm O.D.
∅ 120
220
Hot-water capacity
Scale divisions
*) Differential pressure (working pressure) = Inlet minus outlet pressure.
If the boiler water is lifted after the Reactomat, the differential pressure is reduced by approximately 1 bar for 7 m
(or 2 psi for 3 feet) in lift.
Supply in accordance with our general terms of business.
GESTRA AG
Münchener Straße 77, 28215 Bremen, Germany
Telefon +49 421 3503-0, Telefax +49 421 3503-393
E-mail info@de.gestra.com, Web www.gestra.de
810183-01/406cm · © 1977 GESTRA AG · Bremen · Printed in Germany
