ISO 9001 certified New client? 4% off your first order →
Quotations within 2 hours +6017 798 9016
RFS Hydraulics — Creating Opportunities

Home › Products › Low pressure valves

Ten types, 1/4" to 6", in SS316 to cast iron.

Ball, gate, globe, butterfly and check valves plus Y‑strainers — 1/4" to 6", in SS316, CF8M, cast iron, cast steel, forged steel A105 and brass. Specify on function, size, material and connection — every card below carries all four.

Request a quote See all ten
10Valve types
1/4"–6"Size range
API 598Seat leakage tested
57Catalogues to download

The ten types we stock

Photo, function, size, material, working pressure and end connection on every card — so you can compare them without opening ten pages. Working pressures are the manufacturer’s ratings; tell us the duty and we will confirm the exact model.

3 PC threaded stainless ball valve Isolate · quarter turn

Ball valves

Size1/8"–4" Pressure1000–2000 PSI MaterialSS316 · brass EndsBSPP/NPT · socket weld · butt weld Ready stock→ ANSI 150# SS316 flange end ball valve Isolate · bolted to a flanged run

Flange end ball valves

Size1/2"–6" Pressure10 kg/cm² MaterialSS316 · cast steel EndsANSI 150# · JIS 10K · PN10/16 Ready stock→ SS316 flange end gate valve with handwheel, front view Isolate · full bore when open

Gate valves

Size3/4"–6" Pressure150 / 200 / 800 PSI MaterialSS316 · cast iron · cast steel · forged steel A105 EndsANSI 150# · JIS 10K · threaded · socket weld Ready stock→ ANSI 150# SS316 flange end globe valve Throttle · safe held part‑open

Globe valves

Size3/4"–6" Pressure150 / 200 / 800 PSI MaterialSS316 · cast iron · cast steel · forged steel A105 EndsANSI 150# · JIS 10K · threaded · socket weld Ready stock→ Ductile iron wafer type butterfly valve, front view Throttle · compact on large bore

Butterfly valves

Size1 1/2"–6" Pressure150 PSI MaterialCast iron EndsANSI 150# · wafer or lug type Ready stock→ ANSI 150# SS316 flange end swing check valve Non-return · lowest pressure drop

Swing check valves

Size1 1/2"–4" Pressureto 150 PSI MaterialSS316 · CF8M EndsANSI 150# · JIS 10K Ready stock→ SS316 wafer single plate check valve Non-return · fits between flanges

Single plate check valves

Size1 1/2"–6" Pressureto 232 PSI MaterialSS316 · CF8M EndsANSI 150# · JIS 5K/10K · PN10/16 Ready stock→ SS316 dual plate check valve Non-return · closes fastest

Dual plate check valves

Size1 1/2"–6" Pressureto 300 PSI MaterialSS316 · CF8M EndsANSI 150#/300# · JIS 5K/10K · PN10/16/40 Ready stock→ SS316 threaded spring check valve Non-return · works in any orientation

Spring check valves

Size1/4"–2" Pressure1000 PSI MaterialSS316 EndsBSPP/NPT Ready stock→ ANSI 150# SS316 Y-strainer Strain · highest rated here

Y-strainers

Size1/2"–4" Pressureto 800 PSI MaterialSS316 · CF8M · cast steel EndsBSPP/NPT · flange end Ready stock→

Two rules worth knowing. A ball valve held half open will wear its seat — if the duty is throttling, use a globe. And a Y‑strainer fitted upstream of anything with a seat or a moving part will outlast the thing it protects.

Getting the specification right

Material decides whether the valve survives the medium. These four lines decide whether we can quote it without asking you twice.

The materials, and when each one is right

  • SS316 — the default where corrosion matters. Molybdenum is what gives it the edge over 304.
  • CF8M — the cast equivalent of 316. If a body is cast rather than machined, this is the grade you will see.
  • Cast iron — water and low‑duty service where cost matters more than pressure.
  • Cast steel — takes more pressure and temperature than cast iron, in the same flanged sizes.
  • Forged steel A105 — small bore at higher pressure, threaded or socket weld. This is what gets you to 800 PSI.
  • Brass — small bore water and air, where stainless is more than the job needs.

What to send us

Four things and we can quote without going back and forth:

  • Function — isolate, throttle, stop backflow or strain.
  • Size — nominal bore, and the schedule or flange table if it is flanged.
  • Standard and rating — ANSI 150#/300#, JIS 5K/10K, or PN10/16/40.
  • Medium and temperature — this is what decides SS316 against cast iron.

If you are replacing a valve, the old part number or a photo of the nameplate is usually enough on its own.

Send your schedule →

Catalogues

All 57 low pressure valve catalogues from AF Hydro, grouped by valve type. Direct PDF downloads — no form, no email address.

Ball valves18 catalogues
1 PC Ball ValvesPDF 2 PC FxF Ball ValvesPDF 2 PC MxF Ball ValvesPDF 3 PC Ball ValvesPDF L-Port 3-Way Ball ValvesPDF T-Port 3-Way Ball ValvesPDF Brass Ball ValvesPDF Brass MxF Mini Ball ValvesPDF SS316 MxF Mini Ball ValvesPDF SS316 MxM Mini Ball ValvesPDF SS316 FxF Mini Ball ValvesPDF PN10/16 SS316 Flange End Ball ValvesPDF JIS 10K SS316 Flange End Ball ValvesPDF ANSI 150# Cast Steel Flange End Ball ValvesPDF ANSI 150# SS316 Flange End Ball ValvesPDF ANSI 300# Cast Steel Flange End Ball ValvesPDF ANSI 300# SS316 Flange End Ball ValvesPDF PN16/PN40 SS316 Wafer Ball ValvesPDF
Gate valves10 catalogues
ANSI 150# SS316 Gate ValvesPDF ANSI 150# Cast Steel Gate ValvesPDF ANSI 150# Cast Iron Gate ValvesPDF ANSI 150# Forged Steel Gate ValvesPDF Threaded End SS316 Gate Valves 200 PSIPDF Threaded End SS316 Gate Valves 800 PSIPDF Threaded End A105 Gate Valves 800 PSIPDF Socket Weld A105 Gate Valves 800 PSIPDF JIS 10K SS316 Gate ValvesPDF JIS 10K Cast Iron Gate ValvesPDF
Globe valves10 catalogues
ANSI 150# SS316 Globe ValvesPDF ANSI 150# Cast Steel Globe ValvesPDF ANSI 150# Cast Iron Globe ValvesPDF ANSI 150# Forged Steel Globe ValvesPDF Threaded End SS316 Globe Valves 200 PSIPDF Threaded End SS316 Globe Valves 800 PSIPDF Threaded End A105 Globe Valves 800 PSIPDF Welded End A105 Globe Valves 800 PSIPDF JIS 10K SS316 Globe ValvesPDF JIS 10K Cast Iron Globe ValvesPDF
Butterfly valves5 catalogues
Cast Iron Wafer Butterfly ValvesPDF Cast Iron Lug Butterfly ValvesPDF Ductile Iron Lug Butterfly ValvesPDF Ductile Iron Wafer Butterfly ValvesPDF JIS 10K Cast Iron Lug Butterfly ValvesPDF
Check valves9 catalogues
ANSI 150# SS316 Swing Check ValvesPDF ANSI 150# Cast Steel Swing Check ValvesPDF JIS 10K SS316 Swing Check ValvesPDF Threaded End SS316 Swing Check ValvesPDF Threaded End Brass Swing Check ValvesPDF Single Plate Check ValvesPDF Dual Plate Check ValvesPDF Spring Check ValvesPDF Brass Spring Check ValvesPDF
Y-strainers5 catalogues
ANSI 150# SS316 Y-StrainersPDF ANSI 150# Cast Steel Y-StrainersPDF JIS 10K SS316 Y-StrainersPDF JIS 10K Cast Steel Y-StrainersPDF Threaded End SS316 Y-StrainersPDF

What is in them

  • Dimensions — face‑to‑face, bore, flange drilling and weight, per size.
  • Ratings — working pressure by material and by standard, so you can check a duty before you order.
  • Materials and trim — body, ball or disc, stem and seat for each variant.
  • Testing — every AF Hydro valve is seat‑leakage tested to API 598 and carries a heat number, so a certificate can be matched to the valve in your hand.

Before you download

  • Most are 1 to 2.5 MB, so they open quickly on mobile data.
  • They open in a new tab. Nothing is gated: no form, no sign‑up, no email address.
  • Sizes and ratings are in the catalogue; stock and price are not. Send us the sizes and we will confirm both.
  • Not sure which of the eighteen ball valve sheets applies? Send the duty — medium, pressure, size and end connection — and we will point you at the right one.

All 57 in the catalogue library →
About AF Hydro →

Send the valve schedule, or a photo of the nameplate.

One valve or a full package — priced by a product specialist within two working hours.

Request a quote Browse the product range or call +6017 798 9016
Request a quote on WhatsApp