Spirax Sarco SV615/SV615AS Safety Valves

Description

Spirax Sarco SV615 safety valves are full stroke, full nozzle safety valves for steam, air, non-chemical industrial gases and non-hazardous liquid applications. It can be used for the protection of equipment such as steam or hot water boilers, generators, pressure vessels and general steam, gas or liquid application scenarios.

Available Models

Available types	SKU
1/2" x 3/4" SV615 AS	tba
3/4" x 1 1/4" SV615 AS	tba
1" x 1 1/2" SV615 AS	tba
1 1/4" x 2" SV615 AS	tba
1 1/2" x 2 1/2" SV615 AS	tba
2" x 3" SV615 AS	tba

Caliber and connection

• caliber: DN15, DN20, DN25, DN32, DN40 and DN50.
• Inlet connection: BSP (BS 21) or NPT female thread; hygienic clamp connections (DN15, DN20 and DN25) to BS 4825/ISO 2852/DIN 32676 with 0.8um surface finish on the contact surface with the medium.
• outlet connection: BSP (BS 21) or NPT female thread.

Available Models

Bore sizes from DN15 to DN50, bronze bodies with female threaded connections and stainless steel nozzles. Smaller bore models are available with sanitary clamp connections. All safety valves are available with closed bonnets with simple microlift levers or closed bonnets (gas-tight end cap option). Nitrile, EPDM, or Viton soft-seal options are available. Non-electrolytic nickel plated (ENP) polished finishes for the body, microlift stem cavity (or sealed bonnet), and microlift stem are available, as well as stainless steel nameplates.

Standards and certifications

Fully compliant with EN ISO 4126:2004 and marked to comply with the European Pressure Equipment Directive (PED) 97/23/EC, certified by SAFed TAS. seat sealing performance in accordance with ANSI/API STD 527 - 1992.

Certification

Each safety valve is supplied with a certificate according to EN 10204 2.2, including valve set pressure and liquid test pressure. Material certificates according to EN 10204 3.1 are available on request.

Pressure/Temperature Limits

• Valve body design conditions: PN25.
• Setting pressure range: Minimum 0.3 bar g, maximum 18 bar g for ½" - 1¼", 14 bar g for 1½" and 2".
• temperature limitMetal seat min -90°C, max +230°C; Buna-N seals min -30°C, max +150°C; EPDM seals min -50°C, max +200°C; Fluorinated rubber seals min -20°C, max +120°C.
• Over Pressure: 51 TP3T for vapors, 10 - 251 TP3T for liquids and gases.
• opening and closing differential pressure: Vapors, gases 2.5 - 20%, liquids 10%.
• Maximum permissible back pressure: 37.5 bar g.

material (that sth is made of)

Item	Part	material (that sth is made of)
1	valve body	Bronze, BS EN 1982 CC491KM
2	extrusion nozzle	DN15 and DN20 stainless steel, BS 970 431 S29; DN25 - DN50 stainless steel, BS 3146 Pt2 Gr. ANC2; clamp connections stainless steel, ASTM A276 316L
3	compact disc	Stainless Steel, ASTM A276 316L
4	microliter cavity	Bronze, BS EN 1982 CC491KM
5	sprung	Chrome vanadium alloy steel, BS 2803 735 A50 HS
6	Spindle guide	Brass, BS 2872 CZ 121
7	Spring-loaded top plate	Brass, BS 2872 CZ 121
8	principal axis (in mechanics, optics, botany etc)	Stainless steel, BS 970 431 S29
9	adjusting screw	Brass, BS 2874 CZ 121
10	microlift lever	Ductile iron, Zinc plated
11	plunger pin	Stainless steel, AISI 304
12	spring ring	Stainless steel, BS 2056 316 S42
13	Adjusting handle locking nut	Brass, BS 2872 CZ 121
14	Soft Seal Discs	Stainless Steel/NBR, ASTM A276 316; Stainless Steel/EPDM, ASTM A276 316; Stainless Steel/Fluorinated Rubber, ASTM A276 316
15	airtight end caps	Bronze, BS EN 1982 CC491KM
16	Bonnet Seal	nitrile rubber
17	outer edge	Brass, BS 2874 CZ 121
18	set screw	steel (chemistry)
19	sphere	stainless steels

Displacement data

• Saturated steam displacement (kg/h): (Calculated according to EN ISO 4126: 2004, 5% over pressure, rated displacement coefficient ((Kdr)=0.71)), different valve sizes and set pressures have different values of displacement, e.g. DN15/20 at a set pressure of 0.5 bar g with a displacement of 1.0 kg/h, DN20/32 at a set pressure of 1.0 bar g with a displacement of 95 kg /h, etc.
• Air displacement (l/s): (15°C and 1.013 bar a, calculated according to EN ISO 4126: 2004, 10% over pressure, rated displacement coefficient ((Kdr)=0.71)), with different values of displacement for different valve sizes and set pressures, e.g. 24l/s for DN15/20 at a set pressure of 0.5bar g, DN20/32 at a set pressure of For example, DN15/20 has a displacement of 24l/s at a set pressure of 0.5bar g, DN20/32 has a displacement of 91l/s at a set pressure of 1.0bar g, etc.
• Water discharge (kg/h)(20°C, calculated according to EN ISO 4126: 2004, 10% over pressure, rated displacement coefficient ((Kdr)=0.52)), different valve sizes and set pressure have different values of displacement, such as DN15/20 at a set pressure of 0.5 bar g displacement of 2216kg/h, DN20/32 at a set pressure of 1.0 bar g DN20/32 at a set pressure of 1.0 bar g, the displacement is 8710kg/h, and so on.
• Hot water discharge (kW): (greater than or equal to 100°C, calculated according to EN ISO 4126: 2004, rated displacement coefficient ((Kdr)=0.52)), different values of displacement for different valve sizes and set pressures, e.g. DN15/20 displacement at set pressure 0.5 bar g is 29.96kW, DN20/32 displacement at set pressure 1.0 bar g is 112.81kW, etc.

weights

grout	caliber	Weight (kg)
Threaded connection BSPF x BSPF or NPTF x NPTF	DN15	1.3
Threaded connection BSPF x BSPF or NPTF x NPTF	DN20	2.4
Threaded connection BSPF x BSPF or NPTF x NPTF	DN25	2.9
Threaded connection BSPF x BSPF or NPTF x NPTF	DN32	4.2
Threaded connection BSPF x BSPF or NPTF x NPTF	DN40	8.8
Threaded connection BSPF x BSPF or NPTF x NPTF	DN50	13.0
Hygienic clamp connections	DN15	1.4
Hygienic clamp connections	DN20	2.6
Hygienic clamp connections	DN25	3.1

Installation Notes

Installation should ensure that the centerline of the spring chamber of the safety valve is vertically upward.

Selection instructions

• screw connectionModel SV615 is available in closed bonnet/microlift stem (A) and closed bonnet/gas-tight end cap (B); polished in electroless nickel plating (ENP) (P), electroless nickel plating, and stainless steel nameplate (Q); sizes in DN15, DN20, DN25, DN32, DN40, and DN50; and connections (inlet and outlet) in BSPF x BSPF, NPTF x NPTF, Clamp x BSPF.
• Hygienic clamp connectionsThe same is true for the corresponding models, shapes, finishes, calibers and other options.

Selection Examples

If an ELNP polish is required, add 'P' e.g. DN15 BSPF x BSPF.

How to Order

Example: 1 - Spirax Sarco SV615AN DN15 BSP threaded connection safety valve with 6 bar g set pressure.