We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

SPENCE Steam Trap: Cast Iron, 3/4 in FNPT, 760 lb/hr, 250 psi Max., 450°F Max. - Standard Inverted-Bucket Steam Traps
SPENCEStandard Inverted-Bucket Steam Traps

SPENCE Steam Trap: Cast Iron, 3/4 in FNPT, 760 lb/hr, 250 psi Max., 450°F Max.

The SPENCE 81S-CSD9 is a standard inverted-bucket steam trap made of cast iron, configured for in-line horizontal installation with 3/4-inch FNPT connections. It has a maximum capacity of 760 lb/hr, a maximum…

SKU 3G-OTH-71538

Also listed as: 81SCSD9 · 81S CSD9

Brand
SPENCE
Item
Steam Trap: Cast Iron, 3/4 in FNPT, 760 lb/hr, 250 psi Max., 450°F Max.
Category
Standard Inverted-Bucket Steam Traps
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

SPENCE
Manufacturer Part Number
81S-CSD9
Type
760 lb/hr, Strainer Included
FNPT
3/4 in
Max.
250 psi
Configuration
In-line
Installation Orientation
Horizontal

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

SPENCE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SPENCE 81S-CSD9 is a standard inverted-bucket steam trap made of cast iron, configured for in-line horizontal installation with 3/4-inch FNPT connections. It has a maximum capacity of 760 lb/hr, a maximum pressure of 250 psi, and a maximum temperature of 450°F, and includes a built-in strainer.

Frequently Asked Questions

What is the SPENCE 81S-CSD9 steam trap used for?

The SPENCE 81S-CSD9 inverted-bucket steam trap removes condensate from steam lines in industrial heating and process systems. It is designed for horizontal in-line installation with 3/4-inch FNPT connections, handling up to 760 lb/hr at 250 psi and 450°F.

What are the specifications of the SPENCE 81S-CSD9 steam trap?

The SPENCE 81S-CSD9 is a cast-iron inverted-bucket steam trap with 3/4-inch FNPT connections, 760 lb/hr capacity, 250 psi maximum pressure, and 450°F maximum temperature. It includes a built-in strainer and requires horizontal in-line installation.

Where to buy the SPENCE 81S-CSD9 steam trap worldwide?

3G Electric supplies the SPENCE 81S-CSD9 steam trap to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this cast-iron inverted-bucket steam trap with built-in strainer.

How to install the SPENCE 81S-CSD9 steam trap?

Install the SPENCE 81S-CSD9 horizontally in the steam line with the arrow on the body pointing in the flow direction. Ensure the 3/4-inch FNPT connections are properly sealed. Always follow manufacturer guidelines for piping support and blowdown valve placement.

Used in

Common applications for SPENCE
Steam condensate removal in industrial process heating — SPENCE inverted-bucket steam traps (e.g., 85-CPG9)
Pressure reduction for steam distribution in commercial buildings — SPENCE D50A pressure regulators
Modulating control of steam flow in heat exchangers — SPENCE pneumatic globe control valves (e.g., K1TC811-36RA)
Air venting from steam mains and headers — SPENCE NAV-213 air vents
Condensate drainage in low-pressure steam heating systems — SPENCE 81S-C1E9 steam traps with strainer

SPENCE Products

3G Electric supplies SPENCE standard inverted-bucket steam traps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Steam Trap: Cast Iron, 3/4 in FNPT, 680 lb/hr, 125 psi Max., 450°F Max., Strainer Included (MPN 80S-C9D9)
SPENCE
Steam Trap: Cast Iron, 3/4 in FNPT, 680 lb/hr, 125 psi Max., 450°F Max., Strainer Included (MPN 80S-C9D9)
Steam Trap: Cast Iron, 3/4 in FNPT, 570 lb/hr, 150 psi Max., 450°F Max., Strainer Included (MPN 80S-CND9)
SPENCE
Steam Trap: Cast Iron, 3/4 in FNPT, 570 lb/hr, 150 psi Max., 450°F Max., Strainer Included (MPN 80S-CND9)
Steam Trap: Cast Iron, 3/4 in FNPT, 690 lb/hr, 80 psi Max., 450°F Max., Strainer Included (MPN 80S-C8D9)
SPENCE
Steam Trap: Cast Iron, 3/4 in FNPT, 690 lb/hr, 80 psi Max., 450°F Max., Strainer Included (MPN 80S-C8D9)
Steam Trap: Cast Iron, 1 in FNPT, 950 lb/hr, 70 psi Max., 450°F Max., Strainer Included (MPN 81S-C7E9)
SPENCE
Steam Trap: Cast Iron, 1 in FNPT, 950 lb/hr, 70 psi Max., 450°F Max., Strainer Included (MPN 81S-C7E9)
Steam Trap: Cast Iron, 1 in FNPT, 1,060 lb/hr, 15 psi Max., 450°F Max., Strainer Included (MPN 81S-C1E9)
SPENCE
Steam Trap: Cast Iron, 1 in FNPT, 1,060 lb/hr, 15 psi Max., 450°F Max., Strainer Included (MPN 81S-C1E9)
Steam Trap: Cast Iron, 1 in FNPT, 950 lb/hr, 125 psi Max., 450°F Max., Strainer Included (MPN 81S-C9E9)
SPENCE
Steam Trap: Cast Iron, 1 in FNPT, 950 lb/hr, 125 psi Max., 450°F Max., Strainer Included (MPN 81S-C9E9)

More from SPENCE

View all SPENCE parts
Cast iron inverted-bucket steam trap with 1/2-inch FNPT connection. Rated for 690 lb/hr maximum capacity at 80 psi. Includes integral strainer. Designed for in-line horizontal installation in steam systems to discharge condensate while preventing steam loss
SPENCE
Cast iron inverted-bucket steam trap with 1/2-inch FNPT connection. Rated for 690 lb/hr maximum capacity at 80 psi. Includes integral strainer. Designed for in-line horizontal installation in steam systems to discharge condensate while preventing steam loss
Steam Trap: Cast Iron, 1 in FNPT, 1,000 lb/hr, 30 psi Max., 450°F Max., Strainer Included (MPN 81S-C4E9)
SPENCE
Steam Trap: Cast Iron, 1 in FNPT, 1,000 lb/hr, 30 psi Max., 450°F Max., Strainer Included (MPN 81S-C4E9)
Steam Trap: Cast Iron, 1 in FNPT, 760 lb/hr, 250 psi Max., 450°F Max., Strainer Included (MPN 81S-CSE9)
SPENCE
Steam Trap: Cast Iron, 1 in FNPT, 760 lb/hr, 250 psi Max., 450°F Max., Strainer Included (MPN 81S-CSE9)
Steam Trap: Cast Iron, 2 in FNPT, 10,000 lb/hr, 15 psi Max., 450°F Max., Strainer Not Included (MPN 85-C1H9)
SPENCE
Steam Trap: Cast Iron, 2 in FNPT, 10,000 lb/hr, 15 psi Max., 450°F Max., Strainer Not Included (MPN 85-C1H9)
Steam Trap: Cast Iron, 1 1/4 in FNPT, 6,700 lb/hr, 125 psi Max., 450°F Max., Strainer Not Included (MPN 84-C9F9)
SPENCE
Steam Trap: Cast Iron, 1 1/4 in FNPT, 6,700 lb/hr, 125 psi Max., 450°F Max., Strainer Not Included (MPN 84-C9F9)
Steam Trap: Cast Iron, 3/4 in FNPT, 690 lb/hr, 20 psi Max., 450°F Max., Strainer Included (MPN 80S-C2D9)
SPENCE
Steam Trap: Cast Iron, 3/4 in FNPT, 690 lb/hr, 20 psi Max., 450°F Max., Strainer Included (MPN 80S-C2D9)
Steam Trap: Cast Iron, 2 in FNPT, 9,800 lb/hr, 225 psi Max., 450°F Max., Strainer Not Included (MPN 85S-CRH9)
SPENCE
Steam Trap: Cast Iron, 2 in FNPT, 9,800 lb/hr, 225 psi Max., 450°F Max., Strainer Not Included (MPN 85S-CRH9)
Steam Trap: Cast Iron, 1 1/2 in FNPT, 7,000 lb/hr, 250 psi Max., 450°F Max., Strainer Not Included (MPN 85-CSG9)
SPENCE
Steam Trap: Cast Iron, 1 1/2 in FNPT, 7,000 lb/hr, 250 psi Max., 450°F Max., Strainer Not Included (MPN 85-CSG9)