Manufacturer: NBS Valve
Product type: Double Flange Type

Feature

• Fine control of small amounts, which a butterfly valve cannot do
• Large capacity control, which a globe valve cannot do
• Complete sealing is possible with a double seat
• Smaller, lighter, and cheaper than a globe valve
• Easy to maintain and highly economical

Comparison

Fine Control

Large Capacity

Complete Sealing with Double Seat

Option

Noise Reduction Measures

• Based on Union’s characteristics and ISA calculation formula, noise prediction is performed, and suitable countermeasures are proposed to the customers.
  Installation of a Union multi-plate.
  By installing the Union multi-plate, noise can be reduced by about 10 dBA.
  *For details, please consult with us and check the specifications.

Cavitation Countermeasures

• Based on Union’s characteristics and ISA calculation formula, cavitation prediction is performed, and suitable countermeasures are proposed to the customers.
  Valve flow direction optimized processing.
  Installation of a Union multi-plate.
  *For details, please consult with us and check the specifications.

Environmental Protection Gland

A double-seal structure completely seals any leakage from the valve gland.

• TA-LUFT Standard:
  TA-LUFT is a structure designed to prevent leaks from the valve gland for the purpose of environmental protection.

Structure Feature

Positioner

The positioner is used to adjust the valve opening degree as desired by receiving either an electric current signal (electro-pneumatic positioner) or an air pressure signal (pneumatic positioner) from the control room.
Union + Unipower + Positioner
This combination provides excellent controllability.

Features

• Rotary type: Equipped with a linked lever type that allows for easy zero adjustment and range adjustment.
• Vibration resistance: No resonance in the range of 5-200 Hz (2G).
• Linearity: ±1% (single operation), ±2% (compound operation).
• Hysteresis: 1% (single operation), 1% (compound operation).
• Can be adapted to all installation positions.

Specifications

Type	NC/NE Type	NS Type
Operation Mode	Double Acting (NC/NE-D) / Single Acting (NE-OS)	Double Acting (NS-ON) / Single Acting (NS-NS)
Structure	Scotch Yoke Type Pneumatic Actuator	Scotch Yoke Type Pneumatic Actuator
Connection Standard	ISO5211/1	ISO5211/1
	Namur VDI/VDE3845 (optional consultation needed)	Namur VDI/VDE3845 (optional consultation needed)
Application	ON-OFF	ON-OFF
Body/Cover Material	FCD400	FCD400/FCD450
Cylinder Material	FCD400	STKM13
Shaft Material	S45C/Chrome Plated/Hardened Steel	S45C/Chrome Plated/Hardened Steel
Piston Material	AC4C-T6 Aluminum Alloy	A6061-T6 Aluminum Alloy
O-Ring Material	NBR	NBR
Standard Operating Pressure	0.4 MPa (Air Pressure)	0.4 MPa (Air Pressure)
Pipe Connection Size	Rc1/4 {NC091651, NE091S351S}	Rc1/4 {NS-13N(S), NS-17N(S), NS-28N(S)}
Operating Angle	ON-OFF; 0° ~ 93°	ON-OFF; 0° ~ 93°
Operating Temperature	-20°C ~ +80°C	-20°C ~ +80°C
Protection Structure	Weatherproof (IP55)	Weatherproof (IP55)
Standard Coating	Munsell color system (Heavy anti-corrosion)	Munsell color system (Heavy anti-corrosion)
Manual Operation	G-Type Manual Gear	Side Handle
Limit Switch	1-point type: 1LS (Weatherproof), 1LX (Explosion-proof), VCL (Weatherproof)	1-point type: 1LS (Weatherproof), 1LX (Explosion-proof)
Solenoid Valve	3-way (Explosion-proof), 4-way (Explosion-proof); M15G~M65G (Weatherproof, Explosion-proof)	3-way (Explosion-proof), 4-way (Explosion-proof); M15G~M65G
Air Filter Regulator	AW30~40, XR108 (Mini)	AW30~40, XR108 (Mini)
Speed Controller	AS4000	AS4000
Quick Exhaust Valve	QEV2-8, 10, 15, 20	QEV2-8, 10, 15, 20
Air Tank	AN20, 30, 40, 50B	AN20, 30, 40, 50B
Positioner	DH-12B	DH-12B
Other	Specified coating, volume tank, lock-up valve (optional)	Specified coating, volume tank, lock-up valve (optional)