{"id":3451,"date":"2025-03-29T11:06:42","date_gmt":"2025-03-29T03:06:42","guid":{"rendered":"https:\/\/www.shopvalves.com\/?post_type=product&p=3451"},"modified":"2026-03-24T10:59:07","modified_gmt":"2026-03-24T02:59:07","slug":"spirax-sarco-srv461s-and-srv463s-stainless-steel-direct-acting-pressure-reducing-valves","status":"publish","type":"product","link":"https:\/\/www.shopvalves.com\/en\/product\/spirax-sarco-srv461s-and-srv463s-stainless-steel-direct-acting-pressure-reducing-valves\/","title":{"rendered":"Spirax Sarco Spirax Sarco SRV461 and SRV463 Stainless Steel Direct Acting Pressure Reducing Valves"},"content":{"rendered":"

Spirax Sarco SRV461 and SRV463 Stainless Steel Direct Acting Pressure Reducing Valves All media contact parts are uniformly AISI 316L\/1.4404, 1.4408 and 1.4462 stainless steel. Applications are for steam, liquids and gases. Typical applications include: clean steam, gases and liquids for centrifuges, freeze dryers, sterilizers, autoclaves, process tanks, humidifiers and kitchen equipment.<\/p>\n\n\n\n\n\n\n\n\n\n
MPN<\/th>\ndescriptive<\/th>\n<\/tr>\n<\/thead>\n
1862463<\/td>\nsrv463 dn25 pn40 0.02 - 0.12 barg<\/td>\n<\/tr>\n
1862793<\/td>\nsrv463 dn25 pn40 0.8 - 2.5 barg<\/td>\n<\/tr>\n
1862863<\/td>\nsrv463 dn25 pn40 2 - 5 barg<\/td>\n<\/tr>\n
1862963<\/td>\nsrv463 dn25 pn40 4 - 8 barg<\/td>\n<\/tr>\n
1863063<\/td>\nsrv463 dn25 pn40 6 - 12 barg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Sizes and pipe connections<\/h3>\n\n\n\n\n\n\n
SRV461<\/th>\n\u00bd\", \u00be\", 1\", 1\u00bc\", 1\u00bd\" and 2\" BSP Threads<\/th>\n<\/tr>\n<\/thead>\n
SRV463<\/td>\nDN15, DN20, DN25, DN32, DN40 and DN50 EN 1092 PN40 Flanges<\/td>\n<\/tr>\n
*Other connections, please consult Spirax Sarco.<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pressure\/Temperature Limits<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
Valve body design conditions<\/th>\nPN40<\/th>\n<\/tr>\n<\/thead>\n
Maximum design pressure<\/td>\n38 bar g @ 38 \u00b0C<\/td>\n<\/tr>\n
Maximum design temperature<\/td>\n300 \u00b0C @ 23.2 bar g<\/td>\n<\/tr>\n
Minimum design temperature<\/td>\n-10 \u00b0C<\/td>\n<\/tr>\n
Maximum Operating Temperature Vapor<\/td>\n190 \u00b0C @ 10.9 bar g<\/td>\n<\/tr>\n
Liquids and gases<\/td>\n130 \u00b0C @ 30 bar g<\/td>\n<\/tr>\n
Minimum Operating Temperature Note: Below this temperature, please consult Spirax Sarco.<\/td>\n-10 \u00b0C<\/td>\n<\/tr>\n
Maximum differential pressure<\/td>\nReference table of permissible decompression ratios<\/td>\n<\/tr>\n
Maximum cold hydrostatic test pressure<\/td>\n60 bar g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Allowable decompression ratio (max. P1 \/ P2)<\/h3>\n\n\n\n\n\n\n\n\n\n
Setting range (bar g)<\/th>\nNominal Diameter<\/th>\n<\/th>\n<\/tr>\n<\/thead>\n
G\u00bd\" - 1\" DN15 - DN25<\/td>\nG1\u00bc\" - 2\" DN32 - DN50<\/td>\n<\/td>\n<\/tr>\n
0.02 - 0.12<\/td>\n80:1<\/td>\n50:1<\/td>\n<\/tr>\n
0.10 - 0.50<\/td>\n40:1<\/td>\n25:1<\/td>\n<\/tr>\n
0.30 - 1.10<\/td>\n30:1<\/td>\n18:1<\/td>\n<\/tr>\n
0.80 - 12.00<\/td>\n20:1<\/td>\n12:1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

material (that sth is made of)<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Serial Number Part<\/th>\nmaterial (that sth is made of)<\/th>\nWerkstoff No. 1<\/th>\nAISI corresponding specifications<\/th>\n<\/tr>\n<\/thead>\n
1 Valve Body<\/td>\nstainless steels<\/td>\n1.4404<\/td>\n316L<\/td>\n<\/tr>\n
2 Spring chamber<\/td>\nstainless steels<\/td>\n1.4404<\/td>\n316L<\/td>\n<\/tr>\n
3 Top cover<\/td>\nstainless steels<\/td>\n1.4571<\/td>\n316Ti<\/td>\n<\/tr>\n
4 Seats<\/td>\nstainless steels<\/td>\n1.4404<\/td>\n316L<\/td>\n<\/tr>\n
5 Spools<\/td>\nstainless steels<\/td>\n1.4404<\/td>\n316L<\/td>\n<\/tr>\n
6 Diaphragms<\/td>\nEPDM<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
7 'O<\/td>\nEPDM<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
8 'O<\/td>\nEPDM<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
9 'O<\/td>\nEPDM<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
10 Piston<\/td>\nstainless steels<\/td>\n1.4571<\/td>\n316Ti<\/td>\n<\/tr>\n
11 Upper spring support<\/td>\nstainless steels<\/td>\n1.4571<\/td>\n316Ti<\/td>\n<\/tr>\n
12 Spring<\/td>\nstainless steels<\/td>\n1.4310<\/td>\n301*<\/td>\n<\/tr>\n
13 Adjustment screws<\/td>\nstainless steels<\/td>\n1.4404<\/td>\n316L<\/td>\n<\/tr>\n
14 Locking ring<\/td>\nstainless steels<\/td>\nAISI 300 Series<\/td>\n<\/td>\n<\/tr>\n
15 Flange<\/td>\nstainless steels<\/td>\n1.4404<\/td>\n316L<\/td>\n<\/tr>\n
16 Soft Seal<\/td>\nFEPM<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
17 Spring clamps<\/td>\nstainless steels<\/td>\n1.4301<\/td>\n304<\/td>\n<\/tr>\n
Not directly equivalent, just the closest AISI specification given. For hydrocarbon applications, FPM soft seal spools and diaphragms are available.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Weight (approximate) kg<\/h3>\n\n\n\n\n\n\n\n
1\/2\"-1\"<\/th>\n13.5<\/th>\n7.1<\/th>\n6.1<\/th>\n3.1<\/th>\n3.1<\/th>\n<\/tr>\n<\/thead>\n
DN15 - DN25 (flange)<\/td>\n15.3<\/td>\n8.9<\/td>\n7.9<\/td>\n4.9<\/td>\n4.9<\/td>\n<\/tr>\n
11\/4-2\"<\/td>\n14.4<\/td>\n8.0<\/td>\n7.0<\/td>\n4.0<\/td>\n4.0<\/td>\n<\/tr>\n
DN32 - DN50 (flange)<\/td>\n18.4<\/td>\n12.0<\/td>\n11.0<\/td>\n8.0<\/td>\n8.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Kv value<\/h3>\n\n\n\n\n\n\n\n
caliber<\/th>\n1\/2\"<\/th>\n3\/4\"<\/th>\n1\"<\/th>\n11\/4\" DN32<\/th>\n11\/2\" DN40<\/th>\n2\"<\/th>\n<\/tr>\n<\/thead>\n
Kv value at 20% deviation<\/td>\n4.0<\/td>\n5.6<\/td>\n6.4<\/td>\n17.6<\/td>\n17.6<\/td>\n17.6<\/td>\n<\/tr>\n
Maximum Kv<\/td>\n5.0<\/td>\n7.0<\/td>\n8.0<\/td>\n22.0<\/td>\n22.0<\/td>\n22.0<\/td>\n<\/tr>\n
For valve selection to ensure maximum control accuracy (especially for large load changes), use the Kv value at 20% deviation. Use the maximum Kv value for safety valve selection. Leakage \u2264 0.05% Maximum dielectric value.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Recommended Fluid Flow Rate<\/h3>\n\n\n\n\n\n\n
vapor<\/th>\n10-40m\/s<\/th>\n15-60 m\/s<\/th>\n<\/tr>\n<\/thead>\n
gas (i.e. gaseous substance)<\/td>\nUp to 2 bar: 2 - 10 m\/s; more than 2 barg: 5 - 40 m\/s<\/td>\n<\/td>\n<\/tr>\n
fluids<\/td>\n1-5m\/s<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Security information, installation and maintenance<\/h3>\n

A detailed installation and maintenance guide (IM-P186-02) is provided with the product.
\nNote: When used for steam, the spring chamber is located below the pipe. A downstream pressure sensing tube is also required.<\/p>\n

Ordering Instructions<\/h3>\n

Example:1-BSP Spirax Sarco SRV461 Pressure Reducing Valve, \u00bd\", pressure range 0.8-2.5 bar.<\/p>\n

<\/p>\n

\n

Technical Data Download<\/h3>\n
\nTI-P186-01CN-Chinese.pdf<\/a> <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Spirax Sarco SRV461 and SRV463 Stainless Steel Direct Acting Pressure Reducing Valves All parts in contact with the medium are uniformly AI...<\/p>","protected":false},"featured_media":4871,"template":"","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"product_brand":[24],"product_cat":[103],"product_tag":[58,59,65],"class_list":{"0":"post-3451","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-spirax-sarco","7":"product_cat-pressure-reducing-and-surplussing-valves","8":"product_tag-spiraxsarco-pressure-reducing-valves","9":"product_tag-spiraxsarco-steam-pressure-reducing-valves","10":"product_tag-spiraxsarco-valves","12":"first","13":"instock","14":"sale","15":"shipping-taxable","16":"purchasable","17":"product-type-variable","18":"entry","19":"content-bg","20":"loop-entry"},"_links":{"self":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product\/3451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/media\/4871"}],"wp:attachment":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/media?parent=3451"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_brand?post=3451"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_cat?post=3451"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_tag?post=3451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}