Yoshitake CT-1 is a pneumatic control valve. Its valve-opening is accurately controlled by signals output from a controller. The single-seat globe valve body offers large capacity and excellent controllability. The actuator is a multispring, single-action type.

Features

1. CT-1 offers the standard type electro-pneumatic positioner and the air regulator as accessories and also offers several options of positioner (E/P, Smart Positioner) to be mounted depending on request from end user.
2. Drive part is a compact and lightweight.
3. Spherical main valve offers great sealability and great reduction of valve seat leakage (ANSI Class IV).

Specifications

Specification	Details
Model	CT-1
Nominal size	15-100A
Application	Controlled fluid: Cold and hot water, Air, Steam, Oil, Other non-dangerous fluids Driving fluids: Compressed air
Flange Connection	JIS 10KRF
Max. working pressure	1.0 MPa
Working temperature	-5 to 210°C (no freezing condition)
Plug characteristics	Equal percentage
Range ability	30:1
Sealing (plug and seat)	Metal to metal
Seat leakage	ANSI class IV
Actuator	Single action
Valve action	Reverse (fail to close)*1
Supply air pressure	0.35-0.4MPa*2
Ambient temperature	-20 to 70°C
Material	Body: Cast steel Plug: Stainless steel Seat: Stainless steel Gasket: Stainless steel + Grafoil Packing: V-PTFE

*1 Valve opens when the value of input signal increases. *2 Please apply air pressure between 0.4-1.0MPa for air regulator. Available with ASME or EN flanged.

Cv Value

Nominal size	15A	20A	25A	32A	40A	50A	65A	80A	100A
Cv	6	9	14	25	33	50	85	106	175

Dimensions and Weights

Size	L	HA	HB	D	Stroke	Weight (kg)
15A	184	276	100	220	20	13
20A	184	276	100	220	20	13
25A	184	276	100	220	20	16
32A	222	320	111	270	25	22
40A	222	320	111	270	25	22
50A	254	320	124	270	25	28
65A	276	394	122	350	30	48
80A	298	394	162	350	30	58
100A	352	394	185	350	30	73

Positioner

Available with 2 types of positioners.

Electro-pneumatic Positioner (EP-1)

It is next generation positioner and micro processor equipped providing with various functions such as auto-calibration and the optimum control PID etc.

• Malfunction preventive structure with high tolerance for vibration.
• Quick and accurate response.
• Good efficiency with small air consumption.
• Easy zero/span adjustment.

Smart Positioner (EP-1S)

• LCD monitor shows positioner's condition.
• Excellent performance even under conditions of frequent vibrations.
• With feedback analog signal output terminal.
• Good efficiency with small air consumption.
• Auto-calibration with easy operation.