Spirax Sarco DCV10 (cast stainless steel) and DCV10C (zinc plated cast carbon steel) are wafer pattern centrally guided disc check valves designed to be sandwiched between flanges for use with pumps and general cycling applications. They are suitable for use on a wide range of fluids in process lines, hot water systems, steam, and condensate systems. The centrally guided design ensures an improved lifespan and greater reliability compared to traditional disc check valves. These valves ensure the correct flow of condensate and other suitable fluids while preventing reverse flow.

Standards and Certification

• Standards: Designed in accordance with BS EN 14341:2006. Fully complies with the European Pressure Equipment Directive 2014/68/EU.
• Shut-off: Conforms to EN 12266-1:2003 Rate F.
• Certification: Available with certification to EN 10204 3.1 (must be stated at time of order).

Sizes and Pipe Connections

Sizes: DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200 and DN250.

PN rated design fits between the following flanges:

• DN25 - DN80: EN 1092 PN25, PN16, PN40, JIS/KS 10K and JIS/KS 20K
• DN100 - DN250: EN 1092 PN25, PN16, PN40 and JIS/KS 20K

The ASME rated design fits between the following flanges:

• DN25 - DN80 (ASME version): ASME B16.5 Class 150 and Class 300

Face-to-face dimensions are in accordance with EN 558 Series 49 for the DN125 - DN200 size range and EN 558 Series 52 for the DN250 size.

Materials

DCV10 (DN25 - DN100)

Part	Standard	Material	Specification
Body	PN	Austenitic stainless steel	1.4308
Body	ASME	Austenitic stainless steel	A351 CF8
Disc	-	Austenitic stainless steel	A276 316L / AISI 316L
Spider	-	Martensitic stainless steel	BS 3146-2 ANC2
Spring	-	Stainless steel	BS 2056 316 S42
Gaskets	-	Reinforced exfoliated graphite	-

(Note: For DN32 and DN65, body material is Austenitic stainless steel)

DCV10 and DCV10C (DN125 - DN250)

Part	Model / Standard	Material	Specification
Body	DCV10 (PN)	Austenitic stainless steel	1.4308
Body	DCV10 (ASME)	Austenitic stainless steel	A351 CF8
Body	DCV10C (PN)	Carbon steel	1.0619+N
Body	DCV10C (ASME)	Carbon steel	A216 WCB
Disc / Seat	DCV10 (PN)	Austenitic stainless steel	1.4308
Disc / Seat	DCV10 (ASME)	Austenitic stainless steel	A351 CF8
Spring	All	Stainless steel	316L
Gaskets	All	Reinforced exfoliated graphite	-

Pressure/Temperature Limits

DCV10 (DN25 - DN100)

Body design conditions (PN40 or ASME Class 300):

• PMA Maximum allowable pressure: 40 bar g @ 50 °C (PN40); 49.5 bar g @ 38 °C (ASME 300)
• TMA Maximum allowable temperature: 400 °C @ 23.8 bar g (PN40); 400 °C @ 28.4 bar g (ASME 300)
• Minimum allowable temperature: -10 °C
• PMO Maximum operating pressure: 40 bar g @ 50 °C (PN40); 49.5 bar g @ 38 °C (ASME 300)
• TMO Maximum operating temperature: 400 °C @ 23.8 bar g (PN40); 400 °C @ 28.4 bar g (ASME 300)

DCV10 and DCV10C (DN125 - DN250)

Body design conditions (PN40 or ASME Class 300):

• PMA Maximum allowable pressure: 49.6 bar g @ 38 °C (DCV10); 51.1 bar g @ 38 °C (DCV10C)
• TMA Maximum allowable temperature: 400 °C @ 28.4 bar g (DCV10); 400 °C @ 34.7 bar g (DCV10C)
• Minimum allowable temperature: -29 °C
• PMO Maximum operating pressure (saturated steam): 33 bar g @ 241 °C (DCV10); 42 bar g @ 255 °C (DCV10C)
• TMO Maximum operating temperature: 400 °C @ 28.4 bar g (DCV10); 400 °C @ 34.7 bar g (DCV10C)

WARNING

The product must not be used in the restricted region indicated on the graphs. Product is safe for use under full vacuum conditions.

Kv Values

Size	DN25	DN32	DN40	DN50	DN65	DN80	DN100	DN125	DN150	DN200	DN250
Kv	10.8	10.8	26	43	43	80	130	188	213	432	735

Opening Pressures (mbar)

Differential pressures with zero flow.

Flow Direction	DN25	DN32	DN40	DN50	DN65	DN80	DN100	DN125	DN150	DN200	DN250
↑	25	25	28	29	29	31	33	44	46	48.5	54
→	22.5	22.5	24.5	24.5	24.5	25.5	27	32	33	34	37
↓	20	20	20	20	20	30	20	20	20	20	20

Principle of Operation

The DCV10 and DCV10C are opened by the pressure and flow of condensate and are closed by the pressure of the spring when the flow ceases and before reverse flow occurs.

The curves given in the chart are valid for water at 20 °C. To determine the pressure for other fluids, the equivalent water volume flowrate must be calculated and used in the graph.

Installation

Installation Note

The DCV10 and DCV10C can be fitted in either a horizontal or vertical line in accordance with the direction of flow arrow on the body. The DCV10 must be installed close coupled to the pump. Flanges, bolts (or studs), nuts, and gaskets are to be supplied by the installer.

Spare Parts

The DCV10 and DCV10C are non-maintainable disc check valves. There are no available spares.