Spirax Sarco DCV1 Disc Check Valve

Description

Spirax Sarco DCV1 disc check valves are designed to be mounted between flanges for a wide range of fluids in process piping, hot water systems, steam and condensate systems, with flange spacing in accordance with EN558 Part1, Series 49. standard products are metal-seated for use in steam systems. Seats of other materials are available when used for oil, air, gas and water systems. Note: The butt check valves are not suitable for applications with severe pulsation, such as compressor outlets.

Sizes and pipe connections

• Caliber: DN15, 20, 25, 32, 40, 50, 65, 80, 100
• Mountable Flanges: DCV1 can be mounted between BS10 'E' gauge and 'H' gauge flanges; EN1092 PN6, 10, 16, 25, 40 flanges; JIS 5, 10, 16 and 20 flanges, but DN40, 50, 80 and 100 cannot be fitted between JIS 5 flanges and DN65 and DN80 cannot be fitted between BS10 'E' flanges.

Other options

• Heavy duty springs for boiler feedwater applications (700mbar opening pressure, up to DN65).
• Fluorinated rubber soft seats for oil, gas, and air applications.
• EPDM soft seat for water system applications.

restrictive condition

Maximum valve body design conditions		PN16
PMA - Maximum Allowable Pressure		16 bar g @120 °C
TMA - Maximum Allowable Temperature		260 °C @7 bar g
Minimum permissible temperature		-198 °C
PMO - Maximum Working Pressure		13.2 bar g @196 °C
TMO - maximum operating temperature		260 °C @7 bar g
Minimum working temperature		-198 °C
temperature limit	Fluorinated rubber seat	-15 °C to +250 °C
EPDM valve seat	-50 °C to +150 °C
Maximum cold test water pressure		24 bar g
Note: Lower operating temperatures, consult Spirax Sarco for details.

Scope of work

This product cannot be used in specific areas (specific areas not detailed). NOTE: Work curves are for metal seats only; Viton and EPDM work ranges are limited by seat material.

material (that sth is made of)

Item	Part	material (that sth is made of)	(an official) standard
1	valve body	bronze	WS 2.1050
2	compact disc	austenitic stainless steel	ASTM A276 316
3	Spring Locator	austenitic stainless steel	BS 1449 316 S11
4	Standard springs	austenitic stainless steel	BS 2056 316 S42
5	Heavy Duty Springs	austenitic stainless steel	BS 2056 316 S42

Certificates and Standards

• This product is supplied with a "test report", if you need a certificate, please specify when ordering.
• This product complies with the European Pressure Equipment Report 97/23/EC.
• Sealing standards: standard valves to DIN 3230 part 3, BN2; available on request to DIN 3230 part 3, B03; valves with soft seats to DIN 3230 part 3 BN1 and B01 if differential pressure exists.

Working Principle

Disc check valves are opened by fluid pressure and closed by spring force when there is no flow and before the fluid reverses flow.

weights

caliber	weights
DN15	0.13kg
DN20	0.19kg
DN25	0.32kg
DN32	0.55kg
DN40	0.74kg
DN50	1.25kg
DN65	1.87kg
DN80	2.42kg
DN100	3.81kg

Kv value

DN	Kv
15	4.4
20	6.8
25	10.8
32	17
40	26
50	43
65	60
80	80
100	113
Conversion formula: Cv (UK) = Kv x 0.963; Cv (US) = Kv x 1.156

Opening differential pressure mbar

With standard and high temperature springs, differential pressure at zero flow:

DN	dropout voltage
15	25
20	25
25	25
32	27
40	28
50	29
65	30
80	31
100	33
15	22.5
20	22.5
25	22.5
32	23.5
40	24.5
50	25
65	25.5
80	26.5
15	20
20	20
25	20
32	20
40	20
50	20
65	20
80	20
100	20
When minimum opening pressure is required, springless valves can be mounted on vertical piping with the flow direction from bottom to top.

Ordering Instructions

Example: Spirax Sarco DN50 DCV1 check valve with EN1092 PN25 flange connection.

Security information, installation and maintenance

Refer to the Installation and Maintenance Guide (IM-P134-07) supplied with the product for details.DCV check valves should be installed as indicated by the flow direction arrow on the valve body. Valves with springs can be installed in any direction. When installing valves without springs on vertical piping, be sure to note that the flow direction is from the bottom up. The "cam" design of the valve body allows it to fit a variety of mounting flanges. Rotate the valve body into contact with the flange attachment bolts to ensure that the valve is centered in the piping. The installer supplies the flanges, bolts, nuts and washers. Disc check valves are non-repairable (no spare parts available).
Note: The DCV1 check valve should not be used in situations where there is severe pulsation, such as near a compressor.

Meaning of valve body labeling options

annotate (e.g. a character with its pinyin)	hidden meaning
H'	- High load springs, - Standard metal discs
W'	- Springless, - Standard Metal Discs
V'	- Fluorinated rubber soft seal discs
E'	- Standard Springs, - EPDM Soft Seal Discs
WV'	- Fluorinated rubber soft-seal discs
WE'	- Springless, - EPDM Soft Seal Discs
HV'	- Fluorinated Rubber Soft Seal Discs
HE'	- High Duty Springs, - EPDM Soft Seal Discs
T'	- Tested according to DIN 3230 part3, B03
Unmarked are standard springs with metal discs.

take care of

If products with fluorinated rubber components are used at temperatures approaching 315°C or even higher, the fluorinated rubber may decompose and form hydrofluoric acid, which should be avoided by avoiding skin contact and inhalation of the acid, as this can cause skin burns and damage to the respiratory system. Fluorinated rubber should be disposed of as recommended in the Installation and Maintenance Guide (IM-P134-07), and disposed of properly so as not to cause environmental hazards.