Spirax Sarco Spirax Sarco M10Si/M10Si2RB/M10Si4RB ISO Ball Valves

Spirax Sarco Spirax Sarco M10Si ISO ball valves (DN¼" to DN2½") are three-section ball valves, which as isolation valves cannot be used as regulating valves. Suitable for steam and other industrial fluids, they can be used in environments ranging from vacuum to higher temperatures and pressures, and are equipped with a lockable full handle that supports direct access (threaded and welded types only) without removal from the pipeline. Manual/remote control can be safely and easily accomplished with this ball valve, as the body does not need to be disassembled, and integral ISO body mounting automates the valve without compromising seal integrity.

Available Models

Available types	Specification
M10Si2__ISO	Zinc-plated carbon steel body, PDR 0.8 seat
M10Si3__ISO	Stainless steel body, PDR 0.8 seat
M10Si4__ISO	All stainless steel, PDR 0.8 seat

Note: In the naming convention, FB stands for full bore and RB stands for reduced bore.

Standards and Certificates

• (an official) standard: Fully compliant with the European Pressure Equipment Directive 97/23/EC, with marking available on request.
• Certification: Certificate EN 10204 3.1 available.

Note: If test certificate is required, please specify when ordering; Maximum working pressure may be limited by flange standard, please consult Spirax Sarco for details.

Sizes and pipe connections

full bore

caliber	Pipe connection method	Criteria for correspondence
1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2"	flangeless	DN15 to DN50, ASME (ANSI) Class 150
1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2"	Threaded, welded (BSP, BSPT, API/NPT, BW, SW)	ASME (ANSI) Class 300, EN 1092 PN40

Reduced diameter

caliber	Pipe connection method	Criteria for correspondence
1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2"	flangeless	DN15 to DN65, ASME (ANSI) Class 150
1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2"	Threaded, welded (BSP, BSPT, API/NPT, BW, SW)	ASME (ANSI) Class 300, EN 1092 PN40

Pressure and temperature limits

parameters	instructions	numerical value
PMA	-	100 bar g@60°C
TMA	Maximum permissible temperature	260 °C @0 bar g
TMA	Minimum permissible temperature	-29 °C
PMO	Maximum working pressure under saturated steam	17.5 bar g
TMO	Maximum working temperature	260 °C @0 bar g
TMO	Minimum working temperature	-29 °C
-	Design maximum cold hydraulic test pressure	150 bar g

NOTE: Consult Spirax Sarco below -29°C; ΔPMX maximum differential pressure is limited by PMO; this product cannot be used in the prohibited areas specified in the pressure/temperature limitation charts (A - B corresponds to 2" FB and 2½" RB, A - C corresponds to ¼" -1½" FB, RB, and 2" RB).

Technical data

Technical Parameters	instructions
Flow characteristics	Corrected linear
a thoroughfare	Full bore and reduced bore
leak rate	Test standard ISO 5208 (Class A)/EN12266-1 (Class A)
antistatic	Conforms to ISO 7121 and BS 5351 standards

material (that sth is made of)

Item	Part	Available types	material (that sth is made of)	Corresponding standards/specifications
1	valve body	M10Si2 ISO	Galvanized carbon steel	ASTM A105
1	valve body	M10Si3 ISO	stainless steels	ASTM A182 F 316L
1	valve body	M10Si4 ISO	stainless steels	-
2	bonnet	M10Si2 ISO	Galvanized carbon steel	ASTM A105
2	bonnet	M10Si3 ISO	stainless steels	ASTMA 182 F 316L
2	bonnet	M10Si4 ISO	stainless steels	-
3	steel ball	-	stainless steels	AISI 316
4	tappet	-	stainless steels	AISI 316
5	Seat	-	Carbon/graphite reinforced PTFE	PDR 0.8
6	Stem seals	-	Antistatic reinforced PTFE	-
7	splitter	M10Si2 ISO	Galvanized carbon steel	SAE 1010
7	splitter	M10Si3 ISO	stainless steels	AISI 316
7	splitter	M10Si4 ISO	stainless steels	-
8	Beethoven's Washers	-	stainless steels	AISI 301
9	nut (female component of nut and bolt)	M10Si2 ISO	Galvanized carbon steel	SAE 1010
9	nut (female component of nut and bolt)	M10Si3 ISO	stainless steels	AISI 304
9	nut (female component of nut and bolt)	M10Si4 ISO	stainless steels	-
10	Nameplates (unlabeled)	-	stainless steels	AISI 430
11	Valve stem nut	M10Si2 ISO	Galvanized carbon steel	-
11	Valve stem nut	M10Si3 ISO	stainless steels	SAE 1010
11	Valve stem nut	M10Si4 ISO	stainless steels	AISI 304
12	connecting rod	M10Si2 ISO	Galvanized carbon steel	SAE 1010
12	connecting rod	M10Si3 ISO	stainless steels	-
12	connecting rod	M10Si4 ISO	stainless steels	AISI 316
14	video game controller	-	vinyl resin	-
15	bolt (male component of nut and bolt)	M10Si2 ISO	Galvanized carbon steel	Level 5
15	bolt (male component of nut and bolt)	M10Si3 ISO	stainless steels	-
15	bolt (male component of nut and bolt)	M10Si4 ISO	stainless steels	AISI 304
16	nut (female component of nut and bolt)	M10Si2 ISO	Galvanized carbon steel	-
16	nut (female component of nut and bolt)	M10Si3 ISO	stainless steels	SAE 1010
16	nut (female component of nut and bolt)	M10Si4 ISO	stainless steels	AISI 304
17	stud bolt	M10Si4 ISO	stainless steels	AISI 316
18	stop pin	M10Si2 ISO	Galvanized carbon steel	SAE 12L 14
18	stop pin	M10Si3 ISO	stainless steels	-
18	stop pin	M10Si4 ISO	stainless steels	AISI 304
19	Body/Bonnet Gasket	-	O-Ring (EPDM)	-
20	locknut	-	stainless steels	AISI 316
21	Lockable handle	M10Si2 ISO	Galvanized carbon steel	SAE 1010
21	Lockable handle	M10Si3 ISO	stainless steels	-
21	Lockable handle	M10Si4 ISO	stainless steels	AISI 316
22	Stem seals	-	PEEK	-
23	locking plate	-	stainless steels	AISI 304L

Weight (approximate) kg

caliber	Reduced diameter	Reduced diameter	Reduced diameter	Reduced diameter	full bore	full bore	full bore	full bore
-	Threaded/Butt Weld/Socket Weld	PN40	ASME 150	ASME 300	Threaded/Butt Weld/Socket Weld	PN40	ASME 150	ASME 300
¼"	0.65	-	-	-	0.65	-	-	-
3/8"	0.65	-	-	-	0.72	-	-	-
½"	0.72	2.30	1.77	1.70	0.95	2.60	1.87	2.40
¾"	0.95	3.20	2.35	2.28	1.60	3.80	2.73	3.79
1"	1.60	4.20	3.47	2.91	2.05	4.70	3.55	5.01
1¼"	2.05	5.70	4.47	4.15	2.75	6.40	4.76	6.50
1½"	2.75	6.80	5.96	5.88	4.25	8.30	5.82	9.22
2"	4.25	9.50	9.16	8.12	7.50	12.80	11.91	13.99
2½"	7.50	-	-	15.85	-	-	-	-

KV value

caliber	Reduced through diameter KV value	Full bore KV value
¼"	2.5	2.5
3/8"	6.8	6.8
½"	6	17
¾"	10	36
1"	27	58
1¼"	49	89
1½"	70	153
2"	103	205
2½"	168	-

Conversion formula: (C_{v}(UK) = K_{v} × 0.963); (C_{V}(US) = K_{V} × 1.156)

Working torque(Nm)

caliber	Reduction torque	Full bore torque
¼"	3.25	3.25
3/8"	3.25	3.25
½"	3.25	5.50
¾"	5.50	13.25
1"	13.25	20
1¼"	20	50
1½"	50	60
2"	60	75
2½"	75	-

The above torques apply to valves for frequent use up to a maximum differential pressure of 40 bar; for valves in a fixed position for a long period of time, the torque may be increased further.

protect and maintain

For detailed information, refer to the Installation and Maintenance Guide supplied with the product.

place an order

• Ordering Example: Spirax Sarco ½" threaded M10Si2FB ISO ball valve.
• Ordering InformationIf the model is not selected before ordering, please provide the use parameters (nominal diameter, fluid properties including nominal pressure/temperature/viscosity or acidity/alkalinity, valve body and spool material); if the model has been selected, it can be ordered directly according to the model; when the use of important occasions or pipeline complexity, it is recommended to provide the design drawings and detailed parameters, and be examined and approved by professional staff.

options (as in computer software settings)

• Self-venting steel ball
• Extended stem (50mm/2" and 100mm/4") for complete thermal insulation
• Oval shaped handle to fit in tight spaces (especially hydrophobic stations)

Spare Parts

• Spare parts available: Seat, stem and body seal sets (corresponding to part numbers 5, 6, 19, 22)
• Description of spare parts: Spare parts are shown in solid lines, those shown in dotted lines are not available as spare parts.
• Order spare parts: Order as described above for the type of spare part available, specifying the valve caliber and model number.
• Spare parts ordering example: ½" M10Si2FB ISO ball valve seat and stem seal set.

Installation Precautions

1. Inspection before installation: carefully check whether the valve body, ball, stem and other parts are complete to ensure that there are no defects; check whether the seals are loose or damaged to prevent air or liquid leakage.
2. Installation location selection: choose an easy-to-operate location for convenient switching and maintenance; also consider the flow path when the valve is opened to avoid unnecessary pressure loss.
3. Piping requirements: before and after the pipeline should be coaxial, the two flange sealing surface should be parallel; pipeline should be able to withstand the weight of the ball valve, otherwise need to be equipped with appropriate support; the valve before and after the pipeline blowing clean, remove oil, welding slag and other impurities.
4. Valve inspection: check the ball valve sign, identify intact; the valve will be fully open and closed several times to confirm that the work is normal; remove the two ends of the connection flange on the protective parts, check and clean the valve holes (between the valve seat and the ball of even small particles of foreign matter may damage the sealing surface of the valve seat).
5. Installation details: either end of the ball valve can be installed at the upstream end; handle-driven ball valves can be installed at any position in the pipeline, with a gear box or pneumatic ball valves should be installed in an upright position (on the horizontal pipeline, the driver is above the pipeline); the valve flange and pipeline flange according to the pipeline design requirements for the installation of sealing gasket; flange bolts need to be symmetrical, one by one, evenly tightened; the use of pneumatic drive, connecting the pneumatic pipeline.
6. Special welding requirements: socket welding and flat welding type valves before welding, need to remove the end cap from the valve body, remove the R-PTFE valve seat, the end cap welded to the pipeline, and then install the R-PTFE valve seat and reassembly; disassembly and commissioning before, make sure that there is no medium flow in the pipeline.
7. Requirements specific to steam systems: When used for steam systems, a trap needs to be installed upstream of the valve; open the valve slowly to avoid water hammer.

Seal check

After the ball valve is closed, judge the sealing situation by observing the position of the valve stem: if the position of the valve stem is completely contracted, it means that the sealing is good; if the position of the valve stem is protruding, there may be a leakage problem, which needs to be dealt with in time.

Precautions for use

1. Use of pressure: need to comply with product specifications, too high or too low pressure may affect normal operation.
2. Temperature range: Material and sealing performance should match the fluid temperature range to avoid damage or failure to work due to too high or too low temperature.
3. Switching operation: open or close the valve slowly to avoid severe vibration; pay attention to changes in valve flow to ensure fluid control stability.