Spirax Sarco BRV2S and BRV2B Ductile Iron Pressure Reducing Valves

Description

Spirax Sarco BRV2S and BRV2B Ductile Iron Pressure Reducing Valves are direct acting pressure reducing valves for gases such as steam or compressed air, with a ductile iron body, available with flanged and threaded connections.The BRV2S is available with a stainless steel bellows, the BRV2B with a phosphor bronze bellows, and optional BRV2SP and BRV2BP models with an external inductor tube. Three set pressure ranges are available downstream, distinguished by signage colors.

Available Models

Available types	SKU
1/2" BRV2S GREY (0.14 - 1.7 bar g)	0457300
1/2" BRV2S GREEN (1.40 - 4.0 bar)	0457400
1/2" BRV2S ORG (3.50 - 8.6 bar g)	0457500
3/4" BRV2S GREY (0.14 - 1.7 bar g)	0458300
3/4" BRV2S GREEN (1.40 - 4.0 bar)	0458400
3/4" BRV2S ORG (3.50 - 8.6 bar g)	0458500
1" BRV2S GREY (0.14 - 1.7 bar g)	0459300
1" BRV2S GREEN (1.40 - 4.0 bar)	0459400
1" BRV2S ORG (3.50 - 8.6 bar g)	0459500
DN15 BRV2S GREY (0.14 - 1.7 bar g)	0457393
DN15 BRV2S GREEN (1.40 - 4.0 bar)	0457493
DN15 BRV2S ORG (3.50 - 8.6 bar g)	0457593
DN20 BRV2S GREY (0.14 - 1.7 bar g)	0458393
DN20 BRV2S GREEN (1.40 - 4.0 bar)	0458493
DN20 BRV2S ORG (3.50 - 8.6 bar g)	0458593
DN25 BRV2S GREY (0.14 - 1.7 bar g)	0459393
DN25 BRV2S GREEN (1.40 - 4.0 bar)	0459493
DN25 BRV2S ORG (3.50 - 8.6 bar g)	0459593

Downstream control pressure range

color	Pressure range
grizzly	0.14 - 1.7 bar g
greener	1.40 - 4.0 bar g
orange (color)	3.50 - 8.6 bar g

Note: When the set pressure ranges overlap, it is better to use a lower range spring control. The products are fully compliant with the European Pressure Equipment Directive 97 / 23 / EC, with CE marking as required, and standard products with manufacturer's typical test certificates, which need to be specified when placing an order with the required certificates and test requirements.

Sizes and pipe connections

• ½", ¾" and 1": Screwed BSP (BS 21 Rp) or NPT
• DN15, DN20 and DN25: Flange EN 1092 PN25

Pressure/Temperature Limits

sports event	parameters
Valve body design conditions	PN25
PMA Maximum Allowable Pressure	25 bar g @ 120 °C
TMA Maximum Allowable Temperature	210 °C @ 19 bar g
Minimum permissible temperature	-10 °C
PMO Maximum Working Pressure under Saturated Steam	19 bar g @ 210 °C
TMO Maximum Operating Temperature	210 °C @ 19 bar g
Minimum working temperature	0 °C (below this temperature, consult Spirax Sarco)
Maximum downstream set pressure	8.6 bar g
Maximum differential pressure	19 bar
Recommended Maximum Pressure Reduction Ratio (at maximum flow)	10 : 1
Design maximum cold hydraulic test pressure	38 bar g (test pressure not allowed to exceed 19 bar g with internal components installed)

material (that sth is made of)

Item	Part	material (that sth is made of)
1	spring chamber	Aluminum - Epoxy Coated LM24
2	Adjustment handwheel	polypropylene
3	Upper spring plate	Cast iron DIN 1691 GG 20
4	Pressure regulating spring	Silicon Chromium BS 2803 685 A55, Spring Steel, Stainless Steel 316T/316L
6	Bellows group washers	Stainless steel reinforced with laminated graphite
7	Spring chamber bolt (M8 × 25mm)	Galvanized steel BS 3692 Gr. 8.8
8	valve body	Ductile iron DIN 1693 GGG 40.3
9	Conical Washers	Stainless Steel ASTM A276 316L
10	top bar	Stainless Steel ASTM A276 316L
11	Seat	Stainless steel BS 970 431 S29
12	Seat gasket	Stainless steel BS 1449 316 S11
13	spool	Stainless steel AISI 420
14	Spool return spring	Stainless steel BS 20056 316 S42
15	filter	Stainless steel BS 1449 316 SH
16	plug	Stainless steel BS 970 431 S29
17	Compression Mount Assembly	brass
18	Spring range color signage	polypropylene
19	partitions	Stainless Steel 316L
20	a peg	Copper Plated Mild Steel

Note: Items 10, 11, 13, 14, 15 and 19 are parts in an assembly.

Flow rate for safety valve sizing

Full open flow rate is used for safety valve selection, Kvs value: 1.5 for DN15, 2.5 for DN20, 3.0 for DN25.
Convert the formula:

• Cv (US) = Kv x 1.156
• Cv (UK) = Kv x 0.963

weights

caliber	Threaded connection weight (kg)	Flange connection weight(kg)
DN15 - ½"	1.60	3.90
DN20 - ¾"	1.70	4.25
DN25 - 1"	1.95	4.65

Installation Instructions

Install the pressure reducing valve on horizontal piping in the direction of flow according to the arrow on the valve body.BRV2SP/BRV2BP When using an external inductor tube, remove the plug (16) and install the 6mm O/D compression mount (17).The other end of the 6mm inductor tube should be installed in the piping at least 1m downstream of the valve.

Ordering Instructions

Order according to the description in the table of available spare parts, stating the size, type and pressure range of the pressure reducing valve. Example: Regulating spring for pressure reducing valve DN15 BRV2, pressure range 3.5 - 8.6 bar g (orange); 1 - Pressure reducing valve DN15 BRV2S, ductile iron body, flanged connection EN1092 PN25, stainless steel bellows, fitted with orange spring (3.5 - 8.6 bar g).

Detailed safety information, installation and maintenance are provided in the Installation and Maintenance Guide (IM-P045-10) supplied with the product.