Valves and regulators KINGSTON / Kingston Valves

Safety, check, and control valves from KINGSTON / Kingston Valves: engineering selection of American pressure relief equipment, regulators, and components.

Direct acting safety valves Kingston 112 series

KINGSTON / Kingston Valves 112 series safety valves comply with ASME Section VIII UV rules for fired boilers and pressurized vessels. The design features a precision hard seat, stainless steel ball, and a pull ring allowing routine manual testing of the overpressure discharge mechanism.

Standard brass 112CSS, nickel plated 112CSSEN, and AISI 303 stainless steel 112CR bodies
Factory calibrated set pressure span from 25 to 300 PSIG at operating heat up to 400 °F
Male pipe thread connections in 1/4, 3/8, and 1/2 inch NPT for standard industrial piping
National Board registration and Canadian CRN documentation for demanding plant systems

Compact overpressure relief valves Kingston 100SS and 125SS

KINGSTON / Kingston Valves 100SS and 125SS direct pop relief valves protect pneumatic receivers and auxiliary equipment loops. The rugged brass housing and 440C alloy ball seal tightly under repeated pressure fluctuations across demanding plant air headers and compressor packages.

Hardened 440C stainless steel ball seating against a precision machined metallic orifice
Factory preset relief pressure span from 5 to 300 PSIG in convenient five psi increments
Inlet thread configurations spanning 1/8 through 1/2 inch NPT for compact instrumentation
Minimal exterior footprint providing dependable overpressure venting on air skid units

Soft seat safety valves Kingston KSV and KSVCR series

KINGSTON / Kingston Valves KSV series safety valves meet API 527 bubble-tight seat tightness criteria using resilient soft seals. Stainless KSVCR models made from AISI 303 with FKM polymer discs resist aggressive process gases, steam, and harsh chemicals across industrial production lines.

Bubble-tight sealing performance conforming to API 527 standards preventing media loss
Brass KSV models with silicone disc and stainless steel KSVCR options with FKM elastomeric trim
Connection sizes ranging from 1/8 to 1-1/4 inch NPT with relief ratings from 20 to 450 PSIG
Broad temperature capability from minus 20 to plus 400 °F for chemical and food processing

Liquid relief valves Kingston 103 series with side port

KINGSTON / Kingston Valves 103 series valves protect hydraulic piping and pump bypass loops by directing excess fluid into return piping headers. Red brass bodies and stainless inlet components on model 103D dampen pressure spikes across industrial lubricants and circulating process fluids.

Threaded side discharge outlet allowing piping connections to return lines or drain sumps
Standard 103 models rated to 300 PSIG, 103SS to 500 PSIG, and reinforced 103D reaching 1000 PSIG
Red brass structural body with internal stainless steel stem and durable AISI 302 spring
Engineered for machine tool lubrication headers, high pressure wash skids, and booster pumps

Anti-hammering check valves Kingston 205 and 226 series

KINGSTON / Kingston Valves 205 and 226 series check valves eliminate reverse flow and pressure hammering in piston and rotary screw compressors. Resilient PTFE discs and stainless steel return springs ensure quiet valve seating during high-frequency pumping cycles in plant air supply systems.

Horizontal 205 series check valves spanning 3/8 to 2 inch NPT with low 1 to 3 psi cracking point
Vertical 226 compressor check valves featuring an integrated unloader port rated to 400 PSI
Resilient PTFE seating disc providing wide thermal tolerance from minus 250 to plus 400 °F
Heavy brass body construction using UNS C83600 alloy suited for lubricated air piping

Quick-opening lever flow control valves Kingston 251 series

KINGSTON / Kingston Valves 251 King 1000 series lever valves provide rapid manual shutoff and throttling for high pressure liquids and air streams. The heavy-duty brass body paired with an ergonomic steel squeeze handle allows immediate line isolation on tanker trucks and industrial test rigs.

Straight pattern 251FT configuration and angled 251-30 design with integral 30 degree elbow
Operating fluid pressure rating up to 1000 PSIG with intermittent peak limits to 1200 PSIG
Stainless steel internal operating stem and return spring fitted with durable Buna-N seal rings
Heavy gauge steel squeeze lever ensuring precise manual flow regulation and fluid dispensing

Direct acting safety valves Kingston 112 series meeting ASME criteria

KINGSTON / Kingston Valves 112 series direct acting safety valves protect industrial steam boilers, pressurized vessels, and compressed air headers under ASME Section VIII Division 1 UV requirements.

The engineering layout incorporates a precision metal seat coupled with a high alloy stainless steel ball, delivering dependable seating and prompt opening upon reaching the preset pressure.

The 112CSS variant utilizes heavy brass construction, the 112CSSEN version provides electroless nickel plating for food and beverage washdown zones, and model 112CR features AISI 303 stainless steel.

A sturdy pull ring allows facility operators to perform regular manual testing without removing the valve assembly from operational piping networks.

Compact pop style relief valves Kingston 100SS and 125SS direct acting

Compact direct pop relief valves from KINGSTON / Kingston Valves across 100SS and 125SS series deliver dependable overpressure venting on plant compressors, receiver vessels, and pneumatic control panels.

The design combines a heavy brass housing with a hardened 440C stainless steel ball resting upon a precision machined rigid metal orifice.

A factory calibrated spring ensures bubble-tight sealing prior to pop discharge, offering preset relief pressures from 5 up to 300 PSIG in convenient five psi increments.

Compact external dimensions with 1/8 through 1/2 inch NPT threads permit straightforward integration into tight instrument enclosures, manifold assemblies, and portable compressor skid systems.

Soft seat safety valves Kingston KSV series with zero leakage under API 527

Resilient soft seat safety valves from KINGSTON / Kingston Valves across KSV series meet stringent bubble-tight sealing requirements specified by API 527. Zero gas leakage prevents fugitive emissions and valuable loss of process nitrogen, argon, and high pressure air during normal plant operation.

Base KSV units are fabricated from brass with a resilient silicone disc, while corrosion-resistant KSVCR models utilize AISI 303 stainless steel components and FKM fluorocarbon sealing elements.

Rated for service temperatures ranging from minus 20 to plus 400 °F, KSVCR valves serve cryogenic vaporizers, chemical feed stations, bioreactors, and clean steam loops across industrial manufacturing facilities.

Liquid overpressure relief valves Kingston 103 series with piped side port

Dedicated liquid relief valves from KINGSTON / Kingston Valves across 103 series protect hydraulic circuits, fluid booster pumps, and closed coolant circulation piping loops.

Unlike atmospheric discharge valves, model 103 features an internally threaded female NPT side discharge port designed to route relieved liquid volume back to reservoir storage or floor drain collectors.

The structural body is formed from red brass, while internal stems and heavy springs utilize AISI 302 stainless steel alloys.

For extreme pressure duties, the reinforced 103D variant incorporates a stainless steel inlet fitting rated up to 1000 PSIG on high pressure compressor lubrication circuits and industrial washdown pumps.

Anti-hammering check valves Kingston 205 and 226 series for compressor skids

KINGSTON / Kingston Valves 205 and 226 series check valves prevent reverse fluid flow and destructive pressure surge hammering across reciprocating and rotary screw compressor discharge headers.

The horizontal 205 series features a heavy brass body made from UNS C83600 alloy and a spring-loaded PTFE disc delivering quiet seating action upon reverse flow.

Vertical 226 compressor check valves integrate an auxiliary 1/8 inch NPT unloader port designed to vent head pressure when electric drive motors stop.

Internal trim materials withstand contact with hot oil aerosols across operating temperatures spanning from minus 250 to plus 400 °F, maintaining tight sealing during high-frequency cycling.

Quick opening lever valves Kingston 251 King 1000 and auxiliary hardware

Heavy-duty lever flow control valves from KINGSTON / Kingston Valves across 251 King 1000 series provide rapid manual shutoff and throttling for liquid and air lines up to 1000 PSIG.

An ergonomic steel squeeze lever mechanism allows operators to meter fluid flow smoothly or isolate lines instantly when unloading transport tankers, flushing components, or hydro-testing pressure vessels.

Alongside lever valves, the manufacturer line includes full-port KBV brass ball valves rated to 600 WOG and mechanical 620 automatic drain valves that expel accumulated moisture from air receiver tanks during compressor start and stop sequences across manufacturing plants.

KINGSTON / Kingston Valves and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of KINGSTON / Kingston Valves and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.