Use this guide to find the Gould Solenoid Valve that matches your ASCO® Series valve. All Gould valves are built in the USA using bronze or 316 stainless steel bodies with precision-machined internal parts.
We offer a wide range of seal materials, pressure ratings, and coil enclosures, including NEMA 1 (Indoor), NEMA 4X (Watertight/Corrosive Resistant), NEMA 5 (Dust Tight), and NEMA 7 (Explosion Proof).
For over 70 years, Gould Solenoid Valves has engineered precision two-way solenoid valves that meet or exceed the specifications of leading OEM brands, including ASCO® (Emerson). The table below maps the most common ASCO® series to their Gould equivalents, based on engineering evaluation of published OEM specifications, pressure ratings, temperature ranges, body materials, and coil enclosure classifications. All Gould valves are assembled and tested at our Indianapolis, Indiana facility before shipment — with typical lead times of 24–48 hours after order receipt.
| ASCO® Series | Application | Gould Equivalent | Body Material | Pressure Range | Temp Range | NEMA Rating |
|---|---|---|---|---|---|---|
| 8210 / 8211 | General service, 2-way NC, pilot operated | M Series | Bronze | 5–250 PSI | To 250°F | 4X |
| 8262 | General purpose, brass/SS internals | Q Series | Bronze | 5–400 PSI | -40°F to 300°F | 1, 4, 4X, 5, 7 |
| 8314 | 2-way, stainless steel | K Series | 316 SS | 5–1000 PSI | -40°F to 300°F | 1, 4, 4X, 5, 7 |
| 8344 | Complete stainless steel | KX Series | Complete 316 SS | 5–300 PSI | -40°F to 300°F | 1, 4, 4X, 5, 7 |
| High-temp / steam | Steam, hot water, hot air | Q-1 / K-1 Series | Bronze or 316 SS | 5–400 PSI | To 450°F | 1, 4, 4X, 5, 7 |
| Explosion-proof | Class 1, Div 1/2 hazardous locations | Q-230 / K-230 Series, any series with -2* | Bronze or 316 SS | 5–150 PSI | -40°F to 300°F | NEMA 7 |
| Direct acting / low ΔP | Low-pressure differential, zero ΔP start | B4-21 / BH-19 / QD / KD | Bronze or 316 SS | 0–200 PSI | To 300°F | 1, 4X |
* Any Gould Valve series with -2 in the part number is explosion-proof with a NEMA 7 rating.
Always verify dimensions, pressure ratings, temperature ratings, and seat material compatibility against your system specifications before installation. Contact Gould's engineering team for application-specific confirmation.
When a facility's existing ASCO® valve fails or when engineers are specifying replacements for planned maintenance, speed, material traceability, and engineering support are the deciding factors. Gould Solenoid Valves delivers on all three.
Gould's proprietary Velvetrol® internal piston pilot design provides smooth, controlled actuation without stem packing. The packless construction prevents fugitive emissions, reduces maintenance frequency, and delivers consistent flow coefficients (Cv) throughout the valve's service life. The full-port orifice design maximizes flow efficiency and minimizes pressure drop across the valve.
Gould manufactures valve bodies in cast bronze and CF8M 316 stainless steel, with internal components in brass and SS, 316 SS, 430 FR SS, and 303 SS depending on series. Seal materials include Teflon™ (PTFE), Viton®, Ethylene Propylene (EPDM), and Buna-N — covering the same media compatibility range as ASCO® catalog offerings. For applications requiring complete 316 SS construction on all wetted and non-wetted parts, the KX and KX-1 series provide full stainless equivalency.
Gould valves are available in AC voltages (12, 24, 120, 240, 480 VAC at 50/60 Hz) and DC voltages (12, 24, 32, 48, 115, 230 VDC) — matching the same voltage options found in ASCO® catalogs. This means facilities can order an exact voltage-matched replacement without rewiring or installing control transformers.
Every Gould solenoid coil enclosure is rated to match OEM NEMA specifications: NEMA 1 (general purpose indoor), NEMA 4/4X (watertight/corrosion-resistant), NEMA 5 (dust-tight), and NEMA 7 (explosion-proof for Class 1, Group D hazardous locations). The NEMA 7 option also meets NEMA 4, 4X, and 5 requirements simultaneously, providing enhanced environmental protection without additional cost.
Unlike some aftermarket manufacturers, Gould supplies full rebuild kits for every valve series — including new piston assemblies, pilot assemblies, piston springs, and all applicable seals. Valves can be rebuilt while still in line, minimizing shutdown time. This long-term parts support is a key advantage for facilities managing aging infrastructure on limited maintenance budgets.
Finding the correct Gould replacement for an ASCO® valve requires matching five key parameters. Follow this process to ensure accurate specification:
Step 1: Locate the ASCO® series number
The series number appears on the valve nameplate (e.g., 8210, 8262, 8314). If the nameplate is worn, the series is often stamped on the valve body. Common ASCO® series begin with the digits "8" and are followed by three or four digits identifying the specific configuration.
Step 2: Identify the pipe size
Measure the NPT connection size (e.g., 1/4", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2"). Gould valves are available from 1/8" to 3" NPT in bronze series and 1/8” to 2” in SS series.
Step 3: Confirm operating pressure and temperature
Match the maximum operating pressure differential (MOPD) and fluid temperature range. Gould's M Series covers up to 250 PSI; Q and K Series extend to 400–1000 PSI; and the B & D Series handles up to 1200 PSI for high-pressure liquid service.
Step 4: Verify seat material and media compatibility
Match the seat material to your media: Buna/Viton® for general purpose air, water, light oils; Teflon™ (PTFE) for high temp & high pressure (or compatibility); complete Viton® for gasoline, diesel fuel, fuel oils; Ethylene Propylene (EP) for low pressure steam (or compatibility); Buna-N for petroleum service.
Step 5: Match voltage and coil enclosure
Confirm the supply voltage (AC or DC) and required NEMA enclosure rating. Use the compatibility guide table above or contact Gould's engineering team at 800-634-6853 for a confirmed specification match.
Are Gould solenoid valves truly drop-in replacements for ASCO® valves?
Gould solenoid valves are engineered to match ASCO® specifications for pressure ratings, temperature ranges, pipe sizes, voltage options, and NEMA enclosure classifications. In most cases, they install into the same pipe connections without system modifications. However, customers should always verify dimensional fit, seat material compatibility, and pressure/temperature ratings against their specific application before installation. Gould's engineering team provides free specification-matching support at 800-634-6853.
Which ASCO® series do Gould valves replace?
Gould solenoid valves provide compatible replacements across the most common ASCO® general-purpose, stainless steel, high-temperature, and explosion-proof series. The Gould M Series replaces ASCO® 8210-class general-purpose valves; the Q Series covers ASCO® 8262 and similar bronze pilot-operated valves; the K and KX Series replace stainless steel configurations; and the Q-230/K-230 Series covers NEMA 7 explosion-proof applications. Use the cross-reference guide above or contact Gould for specific part number matching.
How long does it take to receive a Gould ASCO®-compatible valve after ordering?
Most Gould solenoid valves ship within 24–48 hours after order receipt. Gould maintains a large ready-to-ship inventory at its Indianapolis, Indiana facility, and all valves are assembled and tested at the time of order. For emergency replacement situations, same-day or next-business-day shipping is often available. Contact Gould at 800-634-6853 for urgent order processing.
What pipe sizes are available for Gould ASCO®-compatible replacement valves?
Gould solenoid valves are available in NPT pipe sizes from 1/8" to 3", covering the full range of ASCO® standard configurations. Small-body series (B, M) cover 1/8" to 2"; the Q Series extends to 3"; and specialty direct-acting models (QD, KD, B4-21, BH-19) are available in 1/8" to 1" NPT. All sizes are available in both normally closed (NC) and normally open (NO) configurations.
What pressure ratings are available for Gould's ASCO®-compatible solenoid valves?
Gould solenoid valves cover a pressure range from 5 PSI to 1200 PSI depending on series. General-purpose bronze series (M, Q) are rated to 125–400 PSI; stainless steel series (K, KX) extend to 300–1000 PSI; high-pressure liquid service models (D, B-HP) handle up to 1200 PSI. Zero-to-low differential pressure applications are served by direct-acting series (QD, KD, B4-21, BH-19).
What seal/seat materials are available to match ASCO® specifications?
Gould solenoid valves are available with the same seal materials used in ASCO® configurations: Buna/Viton® for general purpose air, water, light oils; Teflon™ (PTFE) for high temp & high pressure (or compatibility); complete Viton® for gasoline, diesel fuel, fuel oils; Ethylene Propylene (EP) for low pressure steam (or compatibility); Buna-N for petroleum service. Seat material is specified with the -3T (Teflon), -3V (Viton), or -3EP (Ethylene Propylene) suffix in Gould's ordering system.
What NEMA enclosure ratings do Gould solenoid valves carry?
Gould solenoid valve coil enclosures are available in NEMA 1 (indoor general purpose), NEMA 4 (watertight), NEMA 4X (watertight and corrosion-resistant), NEMA 5 (dust-tight), and NEMA 7 (explosion-proof for Class 1, Division 1/2, Group D hazardous locations). The NEMA 7 explosion-proof housing simultaneously meets NEMA 4, 4X, and 5 requirements. NEMA 4X is the standard coil enclosure on most Gould series at no additional charge.
What voltages are available for Gould ASCO®-compatible solenoid valve coils?
Gould solenoid valve coils are available in the full range of voltages offered by ASCO®: AC voltages include 12, 24, 120, 240, and 480 VAC at 50/60 Hz; DC voltages include 12, 24, 32, 48, 115, and 230 VDC. Replacement coils are sold separately and can be swapped without removing the valve body from the line. Specify your voltage when ordering using Gould's suffix designation.
Are Gould's ASCO®-compatible valves manufactured in the USA?
Yes. All Gould solenoid valves are manufactured at Gould's Indianapolis, Indiana facility. This domestic manufacturing provides clear material traceability, consistent quality control, and compliance with Buy American Act requirements for government and municipal procurement. Gould has been manufacturing precision solenoid valves in Indianapolis for over 70 years. Unlike many offshore alternatives, Gould's US production enables rapid custom manufacturing and same/next-day shipping from stock.
Can Gould build a custom valve to replace a discontinued or non-standard ASCO® configuration?
Yes. Gould's engineering team custom-manufactures solenoid valves to meet specifications not covered by standard catalog offerings. If you cannot find a direct cross-reference for your ASCO® valve in Gould's compatibility guide, contact Gould at 800-634-6853 or via the contact form. Provide the ASCO® model number, pipe size, operating pressure and temperature, seat material, voltage, and NEMA requirement, and Gould's engineers will confirm an equivalent or build a custom replacement.
What is Gould's Velvetrol® technology, and how does it compare to ASCO®'s design?
Gould's Velvetrol® is an internal piston pilot-operated design that provides controlled, smooth valve actuation without stem packing — eliminating a common leakage point. The packless construction means zero fugitive emissions from the valve stem, unlike stuffing-box or gland-packed designs. Velvetrol® also uses a full-port orifice, which reduces pressure drop across the valve compared to reduced-port designs. This results in longer service life, lower maintenance requirements, and more consistent flow performance over the valve's operational life.
Are rebuild kits available for Gould ASCO®-compatible solenoid valves?
Yes. Gould manufactures complete rebuild kits for all valve series, including a new piston assembly, new pilot assembly, new piston spring, and all applicable seals. Rebuild kits allow valves to be fully serviced while still installed in the line, without removing the valve body — minimizing downtime during maintenance. Rebuild kits are stocked at the Indianapolis facility and available for immediate shipment. Specify your valve series, pipe size, and seat material when ordering a rebuild kit.
ASCO® and Red Hat® are registered trademarks of Emerson or its affiliates. All other trademarks, product names, or brand references on this page are the property of their respective owners. Our products are not manufactured by, sponsored by, endorsed by, or affiliated with Emerson or the ASCO® brand in any way.
For over 70 years, Gould Solenoid Valves has been a trusted leader in precision two-way solenoid valve manufacturing, serving industries where quality, speed, and reliability are non-negotiable. We stand apart through:
