Spirax Sarco BRV71/BRV73 SG Iron Pressure Reducing Valves

Description

Spirax Sarco Spirax Sarco BRV71 and BRV73 Ductile Iron Direct Acting Pressure Reducing Valves, the former with threaded connections and the latter with flanged connections, are used for steam systems. Three different downstream pressure ranges are available, depending on the color of the marking plate (13). Available in a wide range of sizes and piping connections with corresponding pressure/temperature limits, the components are made of various materials, and saturated steam and compressed air selection methods, Kv values, weight information, safety installation and maintenance guides, ordering instructions, and spare parts information are also provided.

Available Models

Available types	SKU
1" BRV71 GREY	2103000
1" BRV71 GREEN	2103100
1" BRV71 ORG	2103200
1 1/4" BRV71 GREY	2103300
1 1/4" BRV71 GREEN	2103400
1 1/4" BRV71 ORG	2103500
1 1/2" BRV71 GREY	2103600
1 1/2" BRV71 GREEN	2103700
1 1/2" BRV71 ORG	2103800
2" BRV71 GREY	2103900
2" BRV71 GREEN	2104000
2" BRV71 ORG	2104100
DN25 BRV73 GREY	2103093
DN25 BRV73 GREEN	2103193
DN25 BRV73 ORG	2103293
DN32 BRV73 GREY	2103393
DN32 BRV73 GREEN	2103493
DN32 BRV73 ORG	2103593
DN40 BRV73 GREY	2103693
DN40 BRV73 GREEN	2103793
DN40 BRV73 ORG	2103893
DN50 BRV73 GREY	2103993
DN50 BRV73 GREEN	2104093
DN50 BRV73 ORG	2104193

Downstream pressure range

color	Downstream control pressure range
grizzly	0.14 - 1.7 bar g
greener	1.40 - 4.0 bar g
orange (color)	3.50 - 9.0 bar g

take note of: When pressure ranges overlap, control with a lower range spring is more effective.

Sizes and pipe connections

• DN25, 32, 40 & 50 flange connection PN16, JIS10, ANSI 150.
• 1", 1¼", 1½" and 2" Screwed BSP and NPT.

Pressure/Temperature Limits

Valve body design conditions	PN16
PMA Maximum Allowable Pressure	16 bar g @ 120 °C
TMA Maximum Allowable Temperature	184 °C @ 10 bar g
Minimum permissible temperature	-10 °C
PMO Maximum Working Pressure under Saturated Steam	10 bar g
TMO Maximum Operating Temperature	184 °C @ 10 bar g
Minimum operating temperature (Note: below this temperature, consult Spirax Sarco)	0 °C
Maximum downstream set pressure	9 bar g
PMX Maximum Working Differential Pressure	10 bar
Recommended maximum pressure reduction ratio (at maximum flow)	10 : 1
Design maximum cold hydraulic test pressure	24 bar g
NOTE: After internal components are installed, test pressures are not allowed to exceed	16 bar g

material (that sth is made of)

Item	Part	material (that sth is made of)
1	valve body	Ductile iron DIN 1693 GGG 40.3 ELNP coating
2	Pressure regulating spring	Silicon Chromium Alloy BS 2803 685 A55
3	adjusting screw	Carbon steel BS 970 230 M07
4	flat washer	Stainless steel Gr.18/10/3-4A
5	adjusting handle	Nylon 10B 140
6	a peg	Stainless steel AISI 420
7	spring-loaded plate	Cast iron DIN 1691 GG 20
8	spring chamber	Aluminum 2ELNP coated
9	upper washer (on bolt)	Semi-rigid layered graphite
10	washer	Semi-rigid layered graphite
11	Bellows set	Stainless Steel 316L
12	Bellows/Actuator Assembly	Stainless Steel 15% Graphite Filled 316L
13	signage	polypropylene
15	locking pin	brass
16	Spool (including seal 27)	Stainless steel BS 970 431 S29
17	filter	Stainless Steel 316L
18	down putter (golf)	Stainless steel BS 970 431 S29
19	bottom cover	Ductile iron DIN 1693 GGG 40.3 ELNP coating
20	bolt (male component of nut and bolt)	Galvanized steel BS 3692 Gr. 8.8
21	bolt (male component of nut and bolt)	Galvanized steel BS 3692 Gr. 8.8
22	spread litter in a cowshed, pigsty etc	Stainless steel BS 1449 304 515
23	Guide bushings	PTFE15% Graphite Filled
24	Response spring	Stainless steel BS 2056 316 S42
25	PTFE washers	Pure PTFE BS 6564 Type 2 Gr. B
26	'O' shaped seal	EPDM E 0962-90
27	Spool 'O' Seal	EDPM E 0962-90

Kv value

1" - DN25	1¼"- DN32	1½"- DN40	2" - DN50
9.3	11.1	15.7	16.2

Conversion formula: Cvv (UK) = Kv x 0.963; Cv (US) = Kv x 1.156

Weight (approximate)

caliber	Thread (kg)	Flange (kg)
DN25 - 1"	4.40	5.90
DN32 - 1¼"	4.20	7.65
DN40 - 1½"	4.95	8.55
DN50 - 2"	4.75	9.40

classifier for sums of money: Flanged weights are for model BRV73 PN16

Security information, installation and maintenance

Detailed information is provided in the Installation and Maintenance Guide (IM-P045-10) supplied with the product.
INSTALLATION INSTRUCTIONS: Install the pressure reducing valve on horizontal piping in the direction of flow according to the arrow on the valve body.

Ordering Instructions

Example: 1 - Spirax Sarco BRV71 Pressure Reducing Valve, stainless steel bellows, fitted with orange 1" spring (3.5 - 9.0 bar g).