TLV MC-COSR-3 and MC-COSR-16 high-precision multi-control valves for steam provide accurate pressure control and temperature control when combined with the TLV SC-F70 or SC-F71 digital indicator controller. The valve consists of the COSR pressure reducing valve and a motorized actuator (MC-GA2). The rapid response brushless motor precisely adjusts the valve position to ensure extremely accurate control, even during adverse process conditions.

WARNING

Install properly and DO NOT use this product outside the recommended operating pressure, temperature and other specification ranges. Improper use may result in such hazards as damage to the product or malfunctions which may lead to serious accidents.

Features

1. When combined with the control algorithms of TLV’s SC-F71 controller, the rapid response brushless motor precisely adjusts the valve position to ensure extremely accurate pressure control.
2. Large surface area integral screen for pilot valve extends trouble-free service.
3. Can be used in conjunction with standard PID controllers as a replacement for a standard control valve to significantly improve T&P control performance.
4. Internal secondary pressure-sensing channel makes external sensing line unnecessary.
5. MC-COSR-16 sizes DN 65 and larger have a silencer for noise reduction.

INFO

MC-COSR-3 cannot be used for temperature control applications.

Specifications

Model	MC-COSR-3	MC-COSR-16
Connection	Flanged	Flanged
Size (DN)	20, 25, 32, 40, 50	15, 20, 25, 32, 40, 50, 65, 80, 100, 150
Body Material	Ductile Cast Iron / Cast Iron	Ductile Cast Iron / Cast Iron
Max. Operating Pressure (barg)	3	16 (Ductile Cast Iron) / 13 (Cast Iron)
Max. Operating Temperature (°C)	220	220 (Ductile Cast Iron) / 200 (Cast Iron)
Primary Pressure Range (barg)	1 - 3	2 - 16 (Ductile Cast Iron) / 2 - 13 (Cast Iron)
Adjustable Pressure Range	0.1 - 0.5 barg	Within 10 - 84% of primary pressure (min. 0.3 barg)
Minimum Adjustable Flow Rate	5% of rated flow rate	5% of rated flow rate (DN 65 - 150: 10%)

Actuator Specifications

Parameter	Specification
Actuator Model	MC-GA2
Power Source Voltage	Free between 100 and 240 V AC (50/60 Hz)
Power Consumption	With motor running: 75 VA max.
Drive System	Positional control by DC brushless motor
Operation Input	4 – 20 mA DC (input impedance: approx. 250 Ω)
Emergency Action	Valve fully closed by an operation signal interruption. When input power is cutoff: held at position just before power was cut off
Time Required to Fully Open/Close	Fully closed ↔ fully open: Approx. 15 seconds
Allowable Ambient Temperature	0 to 50 °C (32 to 122 °F)
Water Resistance	Rain resistant (equivalent to IP54)

Cv & Kvs Values

Size (DN)	15*	20	25	32	40	50	65*	80*	100*	150*
Kvs (DIN)	3.3	5.9	9.5	13.3	20.6	31.9	50.8	72.9	110	236
Cv (UK)	3.2	5.7	9.2	12.9	20.0	31.0	49.4	70.8	107	229
Cv (US)	3.8	6.9	11.1	15.5	24.0	37.2	59.3	85.0	128	275

MC-COSR-16 only. The Cv & Kvs values shown are for the valve in the full fail open position. These values are not to be used for MC-COSR sizing, and instead may be used as one of the factors in calculations for safety valve selection.

Configuration

No.	Name	No.	Name
1	Main Body	14	Diaphragm Support
2	(Main Body) Plug / Cover	15	Spring Housing
3	Main Valve Seat	16	Coil Spring
4	Main Valve	17	Plug – Sensing Line Port
5	Main Valve Holder	18	Motor Unit
6	Piston	19	Drive Unit
7	Cylinder	20	Mounting Plate
8	Pilot Screen	21	Adjustment Screw Guide
9	Pilot Screen Holder	22	Adjustment Screw
10	Pilot Body	23	Terminal Block Cover
11	Pilot Valve Stem	24	Motor Cover
12	Pilot Valve Seat	25	Insulation Plate
13	Diaphragm	26	Cable Lock

Installation Guidelines

In order to ensure stable steam flow, the piping upstream and downstream of the MC-COSR must be straight runs. If a MC-COSR is installed either directly before or after an elbow or control valve, unevenness in steam flow may result in chattering and unstable pressure.

Maintain a straight piping run of 10 d or more when a manual valve, a strainer or an elbow, etc. is installed at the inlet (primary side) of the MC-COSR.

TIP

If an on-off valve, such as a motorized valve, is required to stop supply of steam to the steam-using equipment, install it at the inlet side of the MC-COSR. To prevent water hammer, it is recommended that a slow-acting motorized on-off valve be used.

Wiring Instructions

Background electromagnetic noise that has no effect on analog equipment may cause digital equipment to malfunction or fail. To prevent adverse effects from electro-magnetic (EM) interference, carefully follow the wiring instructions.

1. Power Source Install an overcurrent protection device on the power supply lines (both poles) to prevent overcurrent. Recommended rating of the device: 250V/2A, Delay type.

2. Terminal Block When making a connection to the terminal block, use crimp-style jacks (for M4) with insulation sleeves.

Dimensions

DN	L (DIN 2501 PN25/40)	L (ASME 150RF)	L (ASME 300RF)	H	H1	W	Weight (kg)
15**	130	170	170	582	510	88	17
20	150	182	182	582	510	88	17
25	160	188	192	507	510	93	19
32	180	220	220	610	520	126	24
40	200	222	224	610	520	126	25
50	230	255	261	637	540	157	32
65**	290	372	378	778	635	220	59
80**	310	374	384	778	635	220	62
100**	350	434	450	857	672	265	86
150**	480	600	622	1035	755	330	192

( ) No ASME standard exists for cast iron; machined to fit steel flanges. ** MC-COSR-16 only.