Valves
Related categories: Valves | Check Valves | Control Valves | Globe Valves | Safety Valves
Related categories: Valves | Manifold Valves | Valve Repair Kits & Parts | Gate Valves | Diaphragm Valves
Related categories: Valves | Globe Valves | Ball Valves | Needle Valves | Control Valves
Control valves modulate flow, pressure and temperature to hold your process at set point. They're the final control element in most process loops.
Control Valve Types
- Directional control valves – route flow to actuators
- Flow control valves – throttle and meter flow
- Pneumatic control valves – air-actuated modulation
- Pressure control valves – reducing and back pressure
- Temperature control valves – self-acting and actuated
Sizing a Control Valve
Size by required Cv at minimum, normal and maximum flow, not just line size. Oversized valves control poorly. Choose trim and actuator for the pressure drop and fail-safe position.
Nisco supplies control valves and can help with sizing.
Shop by type: Directional Control Valves | Flow Control Valves | Pneumatic Control Valves | Pressure Control Valves | Temperature Control Valves
Related categories: Valves | Ball Valves | Safety Valves | Check Valves | Diaphragm Valves
Diaphragm valves use a flexible elastomer membrane to isolate the fluid from the valve's working parts. That makes them a strong choice for slurries, corrosive chemicals and clean processes where leaks and contamination aren't acceptable.
Diaphragm Valve Options
- Weir-style bodies – throttling and tight shutoff
- Straight-through bodies – full flow for slurries
- Plastic and lined bodies – PVC, CPVC, PVDF and rubber-lined
- Diaphragm materials – EPDM, PTFE, Buna and natural rubber
- Manual and actuated – handwheel or pneumatic operation
Choosing a Valve
Match diaphragm and body materials to the fluid and temperature. Plan for periodic diaphragm replacement, which is the main maintenance item.
Nisco supplies diaphragm valves and replacement diaphragms.
Related categories: Valves | Safety Valves | Gate Valves | Control Valves | Valve Repair Kits & Parts
Related categories: Valves | Diaphragm Valves | Valve Repair Kits & Parts | Safety Valves | Manifold Valves
Related categories: Valves | Needle Valves | Check Valves | Solenoid Valves | Ball Valves
Related categories: Valves | Valve Repair Kits & Parts | Butterfly Valves | Gate Valves | Diaphragm Valves
Related categories: Valves | Solenoid Valves | Globe Valves | Valve Accessories | Check Valves
Safety valves open automatically to relieve excess pressure, protecting boilers, tanks, compressors and piping from dangerous overpressure. They're required safety devices on most pressurized systems.
Safety Valve Types
- ASME steam safety valves – boilers and steam systems
- Air and gas safety valves – compressors and receivers
- Liquid relief valves – pumps and hydraulic systems
- Brass, bronze and stainless – match service
Choosing a Safety Valve
Select set pressure at or below the protected equipment's rating, and size for the maximum relieving capacity. Confirm ASME code stamps where required, and never plug or modify a safety valve.
Nisco supplies safety valves for steam, air, gas and liquid service.
Related categories: Valves | Control Valves | Diaphragm Valves | Ball Valves | Gate Valves
Shop by type: Cryogenic Valves | Fuel Gas & Oil Valves | Hot Water & Steam Valves | Microfluidic Valves | Pilot Valves | Proportional Valves | Pulse Valves
Related categories: Valves | Valve Accessories | Needle Valves | Valve Positioners | Globe Valves
Valve accessories make valves more capable and easier to operate. Actuators, handles, extensions and locking devices add automation, convenience and safety.
Accessories Available
- Actuators – pneumatic and electric
- Limit switches – position feedback
- Handles and extensions – reach insulated or buried valves
- Locking devices – lockout/tagout
- Gear operators – large valves
Choosing Accessories
Match accessories to valve type, size and mounting standard.
Nisco supplies valve accessories.
Related categories: Valves | Valve Positioners | Solenoid Valves | Needle Valves | Globe Valves
Related categories: Valves | Valve Accessories | Solenoid Valves | Needle Valves | Globe Valves
Related categories: Valves | Gate Valves | Manifold Valves | Diaphragm Valves | Butterfly Valves
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$1,106.73
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About NISCO Inc.
NISCO offers a wide range of pressure gauges & instruments, diaphragm seals, thermometers, valves, and flow control products to the industrial and commercial marketplaces, as well as other resellers like ourselves. We can also provide other value-added services such as gauge repair, NIST traceable calibration, diaphragm seal assembly, and valve automation. NISCO takes pride in providing extensive product knowledge, helpful customer service, and market competitive pricing to help fit whatever need you may have because it is our goal to be regarded by our customers as the best supplier of pressure, temperature, and flow control products.














