Spirax Sarco Spirax Sarco BCV1 and BCV20 Drain Valves

Spirax Sarco Spirax Sarco BCV1 and BCV20 drain valves are small bore, normally closed valves with brass bodies and corrosion-resistant internal parts, primarily used for low and medium pressure boiler drain applications.The BCV1 and BCV20 are identical except for the orifice dimensions, which are 3mm (1/8") for the BCV1 and 6mm (¼") for the BCV20. The valves come with a power connector and are IP65 rated for (3x1mm) (18AWG) cable.

Delivery dimensions and connections

• ½" Threaded Connection Model BSP-230V
• ½" Threaded Connection Model BSP-110V
• ½" Threaded Connection NPT-120V Type
• ½" Threaded NPT-120V (UL/CSA)

restrictive condition

BCV1

• Maximum boiler or steam pressure: 14 bar g (203 psi g) (cyclic operation)
• Medium Temperature: -40-+200°C (-40- +392°F)
• Medium: water and steam
• Maximum ambient temperature: 55°C (130°F)

BCV1 (UL/CSA)

Maximum boiler or steam pressure	9 bar g (130 psi g)
Medium temperature	-40-+180 °C (-40- +356 °F)
medium	Water and steam
Maximum ambient temperature	55 °C (130 °F)

BCV20

Maximum boiler or steam pressure	4 bar g (58 psi g)
Medium temperature	-40-+180 °C (-40- +356 °F)
medium	Water and steam
Maximum ambient temperature	55 °C (130 °F)

Electrical parameters

230 V	207 V - 253 V
110 V type	99 V - 121 V
120 V	108 V - 132 V
frequency	50 - 60 Hz
maximum power	40 VA (startup); 16 VA/12 W (continuous)
Protection level	IP65 (Nema 4)

material (that sth is made of)

Part	material (that sth is made of)
valve body	brass
soft seal	PTFE
internal part	stainless steels

Weight (approximate)

0.75 kg (1.65 Ibs)

quantitative (science)

Available types	BCV1	BCV20
Orifice Size	3 mm ( 1 / 8 ")	6 mm (¼")
Kv value	0.25	0.8

[math: C_{V}(U K) = K_{V} × 0.963 C_{V}(U S) = K_{V} × 1.156]

When used for boiler discharge, the capacity is shown in the table below:

Boiler pressure bar g (psi g)	Displacement kg/h (Ib/h)
	BCV1	BCV20
1 (14.5)	175 (385)	560 (1232)
2 (290)	250 (550)	790 (1738)
4 (580)	350 (770)	1120 (2464)
6 (870)	385 (847)	-
8 (1160)	445 (979)	-
10 (1450)	495 (1089)	-
14 (2030)	590 (1298)	-

When BCV20 is used downstream of the BCS2 discharge control system and steam trap, the discharge capacity table is as follows:

Pressure head through valve m (ft)	Cold water discharge kg/h (Ib/h)	Hot water with flash steam discharge kg/h (Ib/h)
1 (3)	253 (557)	63 (138)
2 (6)	358 (787)	90 (198)
3 (9)	438 (963)	110 (242)
5 (15)	566 (1245)	142 (312)
10 (30)	800 (1760)	200 (440)

Product Description

BCV1

Spirax Sarco normally closed drain solenoid valves, available in types BCV1 and BCV1 (UL/CSA), with brass body, stainless steel seat and PTFE seal.

BCV20

Spirax Sarco normally closed, low pressure drain valve type BCV20 with brass body, stainless steel seat and PTFE seal.

Ordering Instructions

Example: 1 - Spirax Sarco BCV1 or BCV20 drain valve BSP threaded connection 230V 50-60Hz.

Spare parts available

How to order	item number
Iron core and spring mechanism	4034080
Inductive coil 230 V	4034081
Coil 110/120 V	4034082

Order spare parts

See available spare parts list for valve model number
Example: 1 - Iron core spring unit (item no. 4034080) for Spirax Sarco BCV20 drain valve.