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KA31, KA33, KB31, KB33 and KC31 Cast Iron Self …

Page 3 of 3 KA31, KA33, KB31, KB33 and KC31 Cast Iron Self-acting Control Valves TI-P078-02 CH Issue 10 C B Kv values Size DN15 DN20 DN25 DN32 DN40 DN50

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Text of KA31, KA33, KB31, KB33 and KC31 Cast Iron Self …

Local regulations may restrict the use of this product to below the conditions the interests of development and improvement of the product, we reserve the right to change the specification without notice. Copyright 2011Page 1 of 3 TI-P078-02CH Issue 10DescriptionThe KA, KB and KC range of two-port valves are used in conjunction with Spirax Sarco SA control systems to provide a self-acting temperature control , they can be used as electrically actuated temperature control valves by fitting an EL7200 Series electric actuator with a suitable temperature transmitter and typesKA31 Normally open with screwed Normally open with flanged Normally open with phosphor bronze balancing bellows and screwed Normally open with phosphor bronze balancing bellows and flanged Normally open with stainless steel balancing bellows and screwed : Pressure balancing bellows enables the valve to operate against higher differential products fully comply with the requirements of the European Pressure Equipment Directive 97 / 23 / EC and carry the mark when so standard these products are available with a manufacturers Typical Test Repor t. Note: All cer tification / inspection requirements must be stated at the time of order / temperature limitsKA31, KA33, KB31, KB33 and KC31 Cast Iron Self-acting Control ValvesTemperature CPressure bar gSteam saturation curve The product must not be used in this region. Body design conditions PN16Maximum design pressure 16 bar g @ 120 CMaximum design temperature 220 C @ bar gMinimum design temperature -10 CMaximum operating temperature 220 CMinimum operating temperature 0 CNote: For lower operating temperatures consult Spirax Sarco Size DN15 DN20 DN25 DN32 DN40 DN50 KA31 KA33 KB31 - - KB33 - - KC31 - - - - for a maximum cold hydraulic test pressure of 24 bar gSizes and pipe connections Screwed BSP (BS 21 parallel) or NPT:KA31 ", ", 1", 1 ", 1 " and 2"KB31 1", 1 ", 1 " and 2"KC31 1 " and 2"Flanged EN 1092 PN16 and BS 10 Table F:KA33 DN15, DN20, DN25, DN32, DN40 and DN50KB33 DN25, DN32, DN40 and DN50KA31 and KA33unbalanced trimKB31, KB33 and KC31balanced trimPage 2 of 3KA31, KA33, KB31, KB33 and KC31 Cast Iron Self-acting Control ValvesTI-P078-02 CH Issue 101312161453678215148145 72KA31 and KA33unbalanced trim3MaterialsNo. Part Material1 Body Cast iron DIN 1691 GG 25 KA and KB Cast iron DIN 1691 GG 25 2 Bonnet KC - 1 " Cast iron DIN 1691 GG 25 KC - 2" Steel EN 10213 GP240 GH+N3 Valve head Stainless steel BS 970 431 S 294 Valve seat ring Stainless steel BS 970 431 S 295 Valve seat gasket DN15 - DN25 Mild steel BS 1449 CS 4 DN32 - DN50 Reinforced exfoliated graphite6 Return spring Stainless steel BS 2056 302 S 267 Stem KA and KB Brass BS 2874 CZ 121 KC Stainless steel BS 970 321S208 Bonnet gasket Reinforced exfoliated graphite12 Bonnet studs Steel BS 4439 Gr. Bonnet nuts Steel BS 3692 Gr. 8 13 Bellows KB Phosphor bronze EN 12449 Cu Sn 6 KC Stainless steel AISI 316 L14 Bellows gasket Reinforced exfoliated graphite15 Bonnet bush Brass BS 2874 CZ 12116 Plunger Brass BS 2874 CZ 121KB31, KB33 and KC31balanced trimPage 3 of 3KA31, KA33, KB31, KB33 and KC31 Cast Iron Self-acting Control ValvesTI-P078-02 CH Issue 10CBKv valuesSize DN15 DN20 DN25 DN32 DN40 DN50KA31, KA33 , KB33 - - - - - - conversation: Cv (UK) = Kv x Cv (US) = Kv x saturated steam sizing capacities see water valve sizing capacities see /weights (approximate) in mm and kgKA31 and KA33 PN16 BS 10'F' Weight Size A A1 A1 B C Scr. - " 90 130 130 105 37 " 104 150 147 105 37 " 136 160 157 107 51 " 144 180 180 110 - " 150 200 200 110 - - 2" 180 230 230 110 - , KB33 and KC31DN25 - 1" 136 160 157 138 51 " 144 180 180 152 51 " 150 200 200 152 62 - 2" 180 230 230 152 71 parts The spare parts available are shown in solid outline. Parts drawn in broken line are not supplied as sparesKA31 and KA33Valve seat assembly A, D, E, LSet of all gaskets E, LSet of bonnet studs and nuts (set of 4) SKB31, KB33 and KC31Valve seat assembly A, B, C, D, E (excluding bellows and stem assembly) L, U, GBellows and stem assembly G, L, N, HSet of all gaskets B, C, E, L, U, GSet of bonnet studs and nuts (set of 4) SHow to order spares Always order spares by using the description given in the column headed 'Available spares' and state the size and type of valve. Example: 1 - Valve seat assembly for a Spirax Sarco DN32 KB31 self-acting control information, installation and maintenanceFor full details see the Installation and Maintenance Instructions (IM-S21-01) supplied with the note:The valve should be fitted in a horizontal line with the actuator vertically below the to orderExample: 1 off Spirax Sarco 1 " screwed BSP KA31 self-acting control valve with cast iron (Flanged KA33 and KB33)A(Screwed KA31, KB31 and KC31)EDCUABXHSALKB31, KB33and KC31GNKA31 and KA33

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