Description

The CVS10 sanitary in-line spring assisted check valve is manufactured from 316L stainless steel and prevents reverse flow in fluid lines. The CVS10 with metal seat is designed for steam applications or other aggressive applications where a soft seat is not suitable, within the food, medical and pharmaceutical industries.

For water, process fluid and gas applications, soft-seated versions with EPDM, Viton or FEP-Silicone seats are available - See Technical Information sheet TI-P029-10 for further data.

Available Types and Surface Finish

• CVS10-1: Has an internal surface finish of 0.5 μm Ra (20 μin) within ASME BPE SF1, and external surface finish of 0.8 μm Ra (31 μin) and a metal seat.
• CVS10-2: Has an electropolished internal surface finish of 0.38 μm Ra (15 μin) within ASME BPE SF4, and external surface finish of 0.8 μm Ra (31 μin) and a metal seat.

Both the CVS10-1 and CVS10-2 have a suffix ‘M’ to denote metal valve head/seats. For example, CVS10-2M denotes a CVS10 with electropolished internal finish and metal valve head/seat.

Standards and Certification

• The CVS10 fully complies with the European Pressure Equipment Directive 2014/68/EU.
• The CVS10 is designed in accordance with ASME-BPE.
• Standard shut-off: The standard shut-off of the CVS10 with metal seat conforms to EN 12266-1: 2003 Rate D.

Certification (must be stated at time of order placement):

• EN 10204 3.1 material certification.
• Typical surface finish certificates.

Packaging

Packaging for this product is conducted in a clean environment segregated from other non-stainless steel products, and in accordance with ASME BPE. Inlet and outlet connections are capped and the product is sealed in a plastic bag prior to boxing.

Sizes and Pipe Connections

• Sizes: Type A (1/2" and 3/4") / Type B (1" and 1-1/2"), and 2". DN15 to DN50 to DIN 32676 available as standard.
• Sanitary clamp:
  • ASME BPE clamp to Type A (1/2" and 3/4") / Type B (1" and 1-1/2").
  • Sanitary clamp to DIN 32676 Series A / Series 2.

Note: Alternative connections and sizes are available on request.

Materials

No.	Part	Material
1	Body	Stainless steel 316L
2	Valve head	Stainless steel 316L
3	Spring	Stainless steel 316

Pressure/Temperature Limits

Body design conditions	PN10
PMA Maximum allowable pressure	10 bar g @ 220 °C	145 psi g @ 428 °F
TMA Maximum allowable temperature	220 °C @ 10 bar g	428 °F @ 145 psi g
Minimum allowable temperature	-254 °C	-425 °F
PMO Max operating pressure for sat. steam	10 bar g	145 psi g
TMO Maximum operating temperature	220 °C @ 10 bar g	428 °F @ 145 psi g
Minimum operating temperature	0 °C	32 °F
Cold hydraulic test pressure	15 bar g	217 psi g

Dimensions and Weights

(approximate) in mm (inches) and kg (lbs)

Size ASME	Size DIN	A (ASME)	B (ASME)	B (DIN)	Weight
1/2"	DN15	40 (1.6)	25.0 (0.98)	34.0 (1.34)	0.5 (1.10)
3/4"	DN20	40 (1.6)	25.0 (0.98)	34.0 (1.34)	0.5 (1.10)
1"	DN25	25 (0.98)	50.39 (1.98)	50.5 (1.99)	0.6 (1.32)
1-1/2"	DN40	30 (1.2)	50.39 (1.98)	50.5 (1.99)	0.9 (1.98)
2"	DN50	35 (1.4)	63.91 (2.51)	64.0 (2.52)	1.2 (2.65)

Kv Values

Size	1/2"	3/4"	1"	1-1/2"	2"
Kv	2	2	4	8	18

For conversion: Cv (UK) = Kv × 0.963 Cv (US) = Kv × 1.156

Opening Pressures

Differential pressure with zero flow in mbar (psi):

Flow direction	1/2"	3/4"	1"	1-1/2"	2"
→ (Horizontal)	35 (0.51)	35 (0.51)	35 (0.51)	35 (0.51)	35 (0.51)
↑ (Vertical up)	39 (0.57)	39 (0.57)	39 (0.57)	39 (0.57)	39 (0.57)
↓ (Vertical down)	31 (0.45)	31 (0.45)	31 (0.45)	31 (0.45)	31 (0.45)

Operation

The valve is opened by the pressure of the fluid. When fluid flow stops the spring closes the valve before reverse flow can occur.

Installation and Maintenance

For full details see the Installation and Maintenance Instructions (IM-P029-11) supplied with the product.

Spare Parts: There are no spare parts available for this product.

How to Order

Example: 1 off Spirax Sarco 1" CVS10-1 sanitary check valve with metal seat, ASME BPE sanitary clamp connections, and having an internal surface finish of 0.5 micron Ra (20 micro inch). Complete with certification dossier.