Description

The M16Vi and M16Si ISO ball valve series are designed for use as isolating valves on steam and other industrial fluids. The valves are fitted with a lockable handle as standard and can be serviced without removal from the pipeline.

ISO mounting

The integral ISO body mounting allows the valve to be automated without losing sealing integrity, as the body does not require disassembly. Manual to remote control may therefore be easily accomplished using the ISO range of actuators.

Available types

• M16Vi4: ISO stainless steel body, PTFE seat
• M16Si4: ISO stainless steel body, reinforced PTFE seat

Standards

This product fully complies with the requirements of the EU Pressure Equipment Directive (PED) and UK Pressure Equipment (Safety) Regulations (PER).

Technical data

Parameter	Value
Flow characteristic	Modified linear
Port	Reduced bore and full bore versions
Leakage test procedure	ISO 5208 Rate A / EN 12266-1 Rate A

Options

Operation by pneumatic actuator BVA300 series for all sizes.

Size and pipe connections

• BSP screwed and BW butt weld
• Reduced bore: 1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
• Full bore: 3/8", 1/2", 3/4", 1", 1 1/4", 1 1/2"
• Chinese source also lists PN16 flanged versions from DN10 to DN50 depending on bore

Pressure/temperature limits

The product must not be used in the shaded region.

The product should not be used beyond its operating range as damage to the internals may occur.

Parameter	M16Vi4	M16Si4
Body design conditions	PN16	PN16
PMA Maximum allowable pressure	16 bar g @ 50 °C	16 bar g @ 50 °C
TMA Maximum allowable temperature	165 °C	183 °C
Minimum allowable temperature	-10 °C	-10 °C
PMO Maximum saturated steam operating pressure	6 bar g @ 165 °C	9.9 bar g @ 183 °C
TMO Maximum operating temperature	165 °C @ 6 bar g	183 °C @ 9.9 bar g
Maximum differential pressure	Limited to the PMO	Limited to the PMO
Maximum cold hydraulic test pressure	24 bar g	24 bar g

Dimensions

Approximate dimensions in mm.

Reduced bore

Size	DN	A	A1	A2	B	C	D
1/2"	DN15	65	77	141	125	56	21
3/4"	DN20	70	87	150	125	60	25
1"	DN25	80	100	162	150	69	32
1 1/4"	DN32	100	110	184	150	75	35.5
1 1/2"	DN40	110	130	200	192	94	40.5
2"	DN50	125	145	215	192	102	45

Full bore

Size	DN	A	A1	A2	B	C	D
3/8"	DN10	65	65	-	125	56	21
1/2"	DN15	70	70	146	125	60	25
3/4"	DN20	80	90	162	150	69	32
1"	DN25	100	100	180	150	75	35.5
1 1/4"	DN32	110	120	194	192	94	40.5
1 1/2"	DN40	125	135	215	192	102	45

Weights

Approximate weights in kg.

Size	RB Screwed / BW	RB PN16	FB Screwed / BW	FB PN16
3/8"	-	-	0.6	1.6
1/2"	0.6	2.6	0.8	2.8
3/4"	0.8	2.8	1.3	3.3
1"	1.3	3.3	1.8	3.8
1 1/4"	1.8	5.8	2.8	6.8
1 1/2"	2.8	6.8	3.9	7.9
2"	3.9	8.9	-	-

Materials

No.	Part	Material	Standard / Notes
1	Body	Stainless steel	EN 10213 1.4308
2	Stem gasket	RPTFE	-
3	Stem	Stainless steel	ASTM A276 304
4	Packings	Graphite reinforced PTFE	-
5	Spring washer	Spring steel	60Si2MnA
6	Seat	PTFE / reinforced PTFE	M16Vi PTFE, M16Si reinforced PTFE
7	Ball	Stainless steel	ASTM A276 316L
8	Flange	Stainless steel	ASTM A276 304
9	Plastic pipe	Nylon	-
10	Nut	Stainless steel	BS EN ISO 3506 A2-70
11	Bolt	Stainless steel	BS EN ISO 3506 A2-70
12	Stem nut	Stainless steel	SUS 304
13	Gland ring	Stainless steel	ASTM A276 304
14	Nut locking plate	Stainless steel	ASTM A276 304
15	Lever	Stainless steel	ASTM A276 304
16	Limiter bolt	Stainless steel	SUS 304
17	Limiter	Stainless steel	ASTM A276 304
18	Flange seal ring	PTFE	-
19	Connector	Stainless steel	ASTM A276 304

Kv values

Bore	Size sequence	Value sequence
RB	1/2", 3/4", 1", 1 1/4", 1 1/2", 2"	5.5, 11.7, 22.3, 31.7, 62.2, 109.7
FB	3/8", 1/2", 3/4", 1", 1 1/4", 1 1/2"	5.5, 11.7, 22.3, 31.7, 62.2, 109.7

• Cv (UK) = Kv × 0.963
• Cv (US) = Kv × 1.156

Operating torque

Size sequence	M16Vi torque (Nm)	M16Si torque (Nm)
1/2", 3/4", 1", 1 1/4", 1 1/2", 2"	2.5, 4.5, 5.5, 10.0, 18.5, 32.0	3, 5, 12.5, 18, 28, 48

For valves left in a static position for a long period, torque may increase.

Safety information, installation and maintenance

For full detail, see the Installation and Maintenance Instructions supplied with the product.

Installation notes

• Valves with threaded BSP connections are supplied assembled and ready to install.
• Valves with welding BW connections are supplied disassembled in a box after testing.
• Install the valve with the handle in a suitable position.
• For gas service, the valve can be installed in any position.
• Do not mount the valve upside down for liquid service.

When used on steam services:

1. Fit a trapped drain pocket upstream of the valve.
2. Open the valve slowly to prevent the risk of waterhammer damage.

How to order

Example: 1 off Spirax Sarco 1" BW M16Vi4 RB ISO ball valve.

Spare parts

The spare parts available are shown in solid outline. Parts drawn in a grey line are not supplied as spares.

Available spares

Stem gasket, packing, seat, flange seal ring and plastic pipe.

Included parts: 2, 4, 6, 9 and 18.

How to order spares

Always order spares by using the description given in the column headed "Available spares" and state the size and type of ball valve.

Example: 1 Spare kit for a 1" BW M16Vi4 RB ISO ball valve.