Page 530 - Plastic Process Equipment, Inc

ST SERIES COUPLERS

STRAIGHT-THRU FOR FULL UNRESTRICTED FLOW

EXCELLENT FOR MAIN LINE
CONNECTIONS ON MANIFOLDS, ISO 9001
CHILLERS, MOLD TEMPS., ETC. MANUFACTURED IN A
QUALITY SYSTEM CERTIFIED
FACILITY.
PUSH TYPE AUTOMATIC
INDUSTRIAL INTERCHANGE

FEATURES
1. The smooth, open bore with no valving in either half offers minimal
pressure drop and allows easy cleaning in applications where the same
lines are used for more than one media.
2. ST couplers and nipples are machined from solid barstock, providing
a quality coupling that is durable. ST couplers are available in brass
and 303 stainless steel as standard product materials.
3. ST nipples are available in 303 stainless steel, brass and zinc-plated
steel. The ball locking grooves of the steel ST nipples are case
hardened for resistance to brinelling where high cycle rates and
pressure surges are encountered.
4. The ST is an “Interchange” coupling since it dimensionally and
functionally interchanges with similar couplings made by other
manufacturers
APPLICATIONS INTERCHANGEABILITY
NPTF = DRYSEAL USA (AMERICAN) STANDARD
ST Series is the ideal coupling ST Series couplings are known PIPE THREAD VERSUS A STANDARD NPT THREAD
where maximum flow is required as “industrial interchange”
in such applications as high couplings because they are HOW A LEAK FREE JOINT IS ACHIEVED
pressure water and steam dimensionally and operationally NPT threads, when assembled without a sealant, leave a spiral leak path
washers, carpet cleaners, mold interchangeable with similar at the crest-root junction. To seal pressurized fluid, NPT threads need a
coolant lines, etc. Their smooth couplings manufactured by suitable sealer.
open bore allows almost complete Hansen, Foster and others.
cleanability for applications such NPTF threads (Dryseal), on the other hand, when assembled, do not
as food processing, fluid and dye STEEL NIPPLES leave such spiral leak path. This is because they have controlled truncation
transfer lines, etc. at the crest and root, ensuring metal to metal crest-root contact prior to,
Steel ST nipples are zinc plated or just as the male-female thread flanks make contact. Upon further
OPTIONS and hardened for resistance to tightening, the thread crests are flattened out until the flanks also make
brinelling in applications where metal to metal contact. Thus, theoretically at least, there is no passage
Seals- Standard seal material is high cycle rates and pressure left for the fluid to leak, provided all surfaces are flawless and dimensions
Buna-N, but ethylene propylene, surges are encountered. exact. In the real world, however, this is not the case and a sealant/lubricant
viton, or neoprene seals are is necessary to achieve a leak free joint even with NPTF threads. The
available. sealant/lubricant fills all imperfections in the surfaces affecting the seal
and provides lubrication to ease assembly and minimize galling.
SPECIFICATIONS
MINIMUM FLOW DATA RATED PRESSURE WITH
BODY FLOW STEEL
SIZE PASSAGE PRESSURE TEST FLOW BRASS STAINLESS NIPPLES
DIAM. DROP (PSI) (GPM) NIPPLES NIPPLES
1/8 .172 11.6 4.0 2,500 PSI 4,200 PSI 2,600 PSI
1/4 .250 5.7 6.0 5,200 6,700 5,500
3/8 .375 1.8 10.0 2,700 5,500 3,500
1/2 .469 3.2 20.0 2,200 3,000 2,700
3/4 .719 1.3 35.0 1,700 1,700 1,700
1 .969 0.8 50.0 1,200 1,700 2,000
1 1/4 1.187 0.8 76.5 1,700 – –
1 1/2 1.437 2.5 125.0 1,400 – –
NOTE: These pressure ratings are based on the ability of the product to contain pressure. High cycling applications at or near rated pressure especially
if swiveling is involved, will shorten the product’s service life.

PLASTIC PROCESS EQUIPMENT, INC. www.ppe.com
e-mail: sales@ppe.com
E 8303 CORPORATE PARK DRIVE W 6385 MONTESSOURI STREET
A MACEDONIA, OHIO 44056-2300 E LAS VEGAS, NEVADA 89113-1186 Toll Free: USA, Canada & Mexico
S 216-367-7000 • FAX: 216-367-7022 S 702-433-6385 • FAX: 702-433-6388 800-362-0706
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